Making vegetable lasagna with zucchini is a great way to transform your veggies into a five-star meal. And let me assure you, lasagna with zucchini (instead of noodles) is just as delicious as its version made with pasta.

Easy and delicious, zucchini recipes are some of my go-to’s for quick weeknight meals. My Quick Ratatouille and Zucchini Soup are light and luscious vegan recipes that come together in 30 minutes, while Baked Zucchini Fritters make the ideal appetizer for anyone looking for yet another creative way of using this summer vegetable.

Vegetable lasagna with zucchini garnished with basil from the top view.

Table of Contents

Ingredients

This vegetarian zucchini lasagna recipe only uses simple ingredients to fill your plate and delight your tastebuds with rich Italian flavors.

  • Zucchini: Small- and medium-sized zucchini work best in this recipe, as large zucchini, tend to be more watery and have more seeds. Also, note that there’s no need to peel your zucchini before adding them to your lasagna mixture—especially in summer, during the zucchini season.
  • Olive oil
  • Onion
  • Garlic cloves
  • Fresh baby spinach
  • Ricotta cheese: I recommend using full-fat ricotta cheese to ensure this dish comes out as creamy and rich as possible, being sure to drain away any excess liquid. However, if you don’t have any store-bought ricotta on hand or prefer to make your own, you can also prepare Homemade Ricotta with only four basic ingredients.
  • Egg
  • Parmesan cheese
  • Seasonings: To give your gluten-free lasagna the classic taste of Italian flavors, you’ll need dried oregano, fresh basil, lemon zest, Kosher salt, and ground pepper.
  • Marinara sauce: You can use three cups of your favorite marinara sauce to cut down on prep time, or you can take this recipe to the next level by making your own Tomato Basil Sauce.
Zucchini veggie lasagna ingredients in small portions with text on every ingredient.

Optional Add-Ins and Substitutions

  • Use low-fat or skim cheese: If you want to make your low-carb vegetable lasagna low-fat, too, you may use low-fat or skim cheese instead of whole-milk ricotta.
  • Frozen spinach: Don’t have any fresh spinach on hand? Don’t worry! You can use frozen spinach in this easy zucchini lasagna instead, as long as you fully thaw it and squeeze out all of its juices before adding it to your recipe.
  • Squash: To give your recipe a hint of extra sweetness, try making zucchini squash lasagna instead! Simply mix and match your zucchini with a serving of sliced yellow squash.
  • Cottage cheese: For slightly tangier undertones and an extra helping of protein, you can make your vegetarian lasagna with cottage cheese instead of ricotta cheese. However, be sure to remove as much liquid as possible before adding it to your recipe, preferably by draining the cheese in a colander.
  • Other veggies: Adding more vegetables to your zucchini vegetable lasagna is an easy way to add flavor, color, and extra nutrition to your meal. My favorite add-ins include sautéed mushrooms, carrots, onions, and bell peppers. When adding veggies, it is imperative to sautee and soften them first before adding to the recipe.
  • Vegan: Transforming this dish into a vegan zucchini lasagna recipe is a cinch. First, omit the egg. Then, ensure your vegan lasagna is dairy-free by substituting traditional milk-based cheese with your favorite vegan ricotta, vegan parmesan, and vegan mozzarella. If you prefer to make your own cheese, it only takes five minutes to make tofu ricotta and vegan parmesan with nutritional yeast.
  • Add meat: Satisfying meat eaters is a piece of cake with this versatile zoodle dish. Layer in a half-pound of sauteed ground beef or ground turkey, and prepare your mouth for hearty, savory flavors.

How to Make Zucchini Lasagna

Ever wonder how long to bake zucchini lasagna or how to layer your casserole perfectly? This beginner-friendly guide will show you how to make a veggie lasagna with zucchini that will taste straight out of an Italian restaurant. 

Steps showing how to slice zucchini for lasagna and saute veggies for filling.
  1. Prepare the veggie lasagna noodles: To slice your veggies, I recommend using my go-to method to slice zucchini for lasagna (which I detail more fully in my guide on How to Cut Zucchini for lasagna.) First, cut off a small bit from the top and bottom of each zucchini. Then, hold the end of the zucchini in one hand and use your other hand to shave the veggie lengthwise into thin slices using a veggie peeler, Y peeler, sharp knife, or mandoline slicer. These slices will serve as your vegetable lasagna “noodles.” When the veggie becomes too thin to grasp, lay it on your cutting board and use it as support while you finish slicing.
  2. Let the slices rest: Arrange the zucchini slices in a single layer over a clean kitchen towel or a few paper towels. Let them rest while you prepare the remaining ingredients, as they will naturally release excess moisture during this time. Pat the zucchini dry when ready to assemble the lasagna.
  3. Saute the onions: Heat the olive oil in a medium skillet over medium-high heat. Then, add the onions and sauté, stirring occasionally, until they turn translucent (about five minutes). Lower the heat to medium, add the garlic, and sauté the mixture for one more minute.
  4. Cook the spinach: Add the spinach to the pan and cook until wilted (approximately 2-3 minutes). Then, remove the skillet from the heat, and let it cool for a few minutes. While it rests, begin preparing the ricotta mixture. However, before adding it to the filling, be sure to drain any excess liquid from the pan.
Steps showing how to make the ricotta filling for no pasta lasagna vegetarian.
  1. Make the ricotta filling: In a medium bowl, mix the ricotta cheese, egg, parmesan cheese, oregano, basil, lemon zest, salt, and black pepper.
  2. Add the spinach: Add the sauteed spinach and onion to the ricotta mixture. Stir until thoroughly combined.
  3. Prepare the oven: Preheat the oven to 375 degrees F.
A collage of steps showing how to layer zucchini noodle lasagna.
  1. Add the tomato sauce: Take out a 9×13-inch baking dish, and spread ¼ cup of the tomato sauce over the bottom.
  2. Start the assembling: Cover the lasagna pan with zucchini noodles in a single thin layer. Arrange the slices on top of the tomato sauce, beginning at the shorter side and working across the pan. Cover empty spaces with extra pieces, using about 12-13 slices per layer.
  3. Add the ricotta filling: Spread ⅔ cup of the ricotta mixture evenly over the layer of zucchini noodles. Then, spoon another ½ cup of the tomato sauce on top, and sprinkle that with ⅓ cup of mozzarella cheese.
A collage of images showing how to bake zucchini lasagna vegetarian recipe.
  1. Finish assembling the vegetable noodle lasagna: Repeat the assembly process (Steps 8-10) four more times, resulting in five layers in total. Top it with the remaining tomato sauce and shredded mozzarella.
  2. Bake: Cover the spinach and zucchini lasagna with aluminum foil. Bake the dish for 30 minutes. Remove the aluminum foil from the top of the baked zucchini lasagna and cook it for 15 minutes or until the top turns a bubbly brown.
  3. Rest, garnish, and serve: Let the dish cool for 15 minutes, and if any excess liquid remains, drain it before serving.

How to Make Ahead, Store, Reheat, and Freeze?

This easy zucchini lasagna recipe is just what every busy chef needs. This delicious dish is perfect for effortless meal prep, storage, and hands-free reheating.

  • Make ahead: This zucchini meatless lasagna is a great make-ahead dish for busy weeknight dinners. First, assemble and bake the lasagna as instructed. Then, bring the dish to room temperature, drain any excess liquid, and place it in an airtight container. Store it in the refrigerator for up to three days. When ready to eat, reheat the lasagna in a 350-degree F. oven for 30 minutes or until it warms through.
  • Storage of leftovers: Let your veggie lasagna come to room temperature before storing. Then, transfer it to an airtight container and keep it in the refrigerator for up to three days. Also, drain the lasagna before eating, as it will likely develop extra moisture during storage. 
  • Reheat: After storing your no-meat lasagna in the fridge, drain any excess liquid and reheat it in a 350-degree F. oven for 10-15 minutes or until warm.
  • Freeze: When freezing lasagna with spinach and zucchini, let it reach room temperature first. Drain all excess liquid, then portion it into an airtight container or cover it tightly with stretch film to avoid freezer burn. Transfer the covered dish to the freezer for upto a month.
  • Thaw: Thaw your frozen veggie lasagna overnight in the refrigerator. Be sure to drain any excess liquid before reheating. Then, place it in a 350-degree F. oven for 20-30 minutes or until heated through. 

Expert Tips

You don’t have to be an Italian chef to prepare a gourmet vegetable lasagna recipe with zucchini. These master tips will ensure your healthy no-pasta recipe always comes out rich, tender, and flavorful.

  • Excess liquid/removing moisture: Because zucchini carries so much water, letting your slices rest on a towel before incorporating them into your lasagna assembly is essential. This time allows the zucchini to naturally sweat out its excess liquid, keeping your zucchini lasagna from becoming soggy. Though some recipes ask you to salt your zucchini before cooking, we found this extra step unnecessary.
  • Layering: Do not stress about the zucchini noodles being perfect. As long as each layer is covered with veggie noodles and then properly spread with tomato sauce and ricotta mixture, you should be fine. It is okay if your slices are imperfect. Simply cover as much of your lasagna surface with zucchini as possible, and your bake will come out perfectly.
  • Equipment: It is important that your zucchini is sliced thinly (⅛-inch pieces.) When we were developing this recipe, we initially tried to slice zucchini noodles using a mandoline slicer. While it did the job, we found that a vegetable peeler was easier to use. If you own a Y-peeler, that is even better, but either one would work.
  • For thicker Slices: If you do not own a peeler or a mandoline, then you can use a sharp knife to slice the zucchini. Though keep in mind that cutting thin, equal strips may be more difficult. If your knife-cut slices are thicker in width, then you can pre-bake them before adding them to your lasagna layers to remove excess moisture and reach a tender consistency. Line a baking sheet with parchment paper, and arrange your zucchini strips in a single layer. Preheat your oven to 350 degrees F. and bake them for 8-10 minutes, flipping them halfway through.
  • Bake covered then uncovered: Cheese tends to cook more quickly than the other lasagna layers, so it’s important to bake your dish covered for the first thirty minutes and uncovered for an additional fifteen. This way, your lasagna will cook fully without drying out, and your cheese will lightly melt and brown without burning.
  • Rest before serving: Let this grain-free lasagna rest for 10-15 minutes after removing it from the oven. This resting time will help the lasagna solidify its shape, making it easier to cut and serve neatly.
Person cutting squash lasagna from the top view.

What to Serve with this Meatless Zucchini Lasagna?

Vegetarian lasagna with zucchini is the perfect meal for any night of the week. This collection of menu ideas will complete your table with everything from flaky garlic bread to succulent poultry.

  • Bread: No one can resist sopping up gooey lasagna sauce with a hearty piece of bread. A crusty loaf, like ike my No-Knead Bread, is ideal for balancing the tender texture of the zucchini lasagna noodles. For something quick (and super flavorful!), our Air Fryer Garlic Bread also makes an excellent addition to the meal.
  • Salad: Green salads are the way to go if you’re looking for a light, nutritious side to pair with your healthy zucchini lasagna recipe. Creamy Caesar Salad is a classic Italian option, while Quinoa Avocado Salad is a colorful and crisp mix that comes together in just 15 minutes. For other equally healthy, filling sides, you could also whip up any of my other Quinoa Salad Recipes and prepare yourself for a brilliant spread of delicious food.
  • With meat: Want to add some hearty protein to your meat-free lasagna? This cheesy, veggie-packed recipe is great for serving alongside Chicken Parm, Chicken Fricassee, and Grilled Cornish Hens.

FAQs

How do you keep zucchini lasagna from getting watery?

Zucchini tends to carry a lot of juices, so to avoid watery zucchini lasagna, I recommend letting your veggie slices rest on paper towels for a few minutes before adding them to your baking pan. This resting time will help draw out excess moisture before baking. Other ways to reduce wateriness include letting your baked lasagna rest after cooking so water can either evaporate or more evenly permeate its layers. It’s also a good rule of thumb to select fresh, small- or medium-sized zucchini, as they contain less fluid than larger, less fresh veggies. Still, because of the nature of zucchini, your veggie lasagna will inevitably have a little more liquid than classic lasagna, so don’t worry if you have to drain the top of your dish before serving or during storage.

Can zucchini lasagna be frozen?

You can freeze the dish once it reaches room temperature. Just be sure to transfer your lasagna to an airtight container or cover it as tightly as possible with several layers of stretch film to keep it from becoming freezer burnt. You can then thaw your frozen vegetarian zucchini pasta overnight in the fridge and reheat it for about 20 minutes at 350 degrees F.

Other Vegetarian Dishes with Summer Vegetables

Nothing tastes as light yet filling as this summer vegetable lasagna. However, if you want to make the most of your summer garden, these other healthy veggie dishes will satisfy all your cravings.

If you try this Vegetarian Zucchini Lasagna recipe or any other recipe on Foolproof Living, please take a minute to rate the recipe and leave a comment below. It is a great help to others who are thinking of making the recipe. And if you took some pictures, be sure to share them on Instagram using #foolproofeats so I can share them on my stories.

Print

Vegetarian Zucchini Lasagna Recipe

5 from 2 votes
By: Aysegul Sanford
Yields9 slices
Prep Time30 minutes
Cook Time30 minutes
Resting Time15 minutes
Total Time1 hour 15 minutes
Vegetarian Zucchini Lasagna made with zucchini "noodles" instead of pasta noodles!  Layered with ricotta & tomato sauce, this healthy, gluten-free, grain-free, and keto-friendly meal is the perfect summer meal.

Ingredients 

  • 3 medium-sized zucchini, approximately 1 pound in total (60 slices)
  • 2 tablespoons olive oil
  • 1 medium onion, chopped
  • 4 cloves garlic, finely minced or crushed through a garlic press
  • 6 oz. fresh baby spinach, roughly chopped
  • 1 ½ cups full-fat ricotta cheese*, excess liquid drained
  • 1 large egg
  • 1/2 cup parmesan cheese
  • 2 teaspoons oregano, dried (optional)
  • 3 tablespoons basil, fresh and chopped plus more for garnish
  • 1 tablespoon lemon zest
  • ½ teaspoon Kosher salt
  • ½ teaspoon ground pepper
  • 3 cups Tomato Basil Sauce, or your favorite storebought Marinara Sauce
  • 2 ⅓ cups mozzarella, shredded

Instructions 

  • To prepare the zucchini: Cut a small slice off the end of each zucchini. Slice the zucchini thinly lengthwise using either a mandoline, a y peeler or a sharp knife*.
  • Arrange the zucchini slices in a single layer on a kitchen towel or a few sheets of paper towels. As they rest, you will notice a trace amount of moisture emerging on the surface. Let them sit on the counter while you are working on the rest of the ingredients, and be sure to pat dry before the assembly stage.
  • In a medium skillet, heat the olive oil over medium-high heat, then add the onions and saute, stirring occasionally, until translucent, approximately 5 minutes. Lower the heat to medium and add the garlic and saute for an additional 1 minute.
  • Add the spinach and cook until fully wilted, 2-3 minutes. Remove from the heat, and let it cool for a few minutes while you are making the ricotta mixture. If there is any liquid in the pan, drain it prior to adding to the ricotta mixture.
  • To prepare the ricotta filling: Mix together ricotta cheese, egg, parmesan cheese, oregano, basil, lemon zest, salt, and pepper in a medium bowl.
  • Add in the spinach mixture and stir to combine.
  • Preheat the oven to 375 degrees F.
  • To assemble the zucchini lasagna: Spread ¼ cup of tomato sauce at the bottom of a 9×13-inch casserole dish.
  • Arrange the zucchini slices on top of the tomato sauce, placing them across the shorter width and covering the empty spots with more zucchini slices. You should use around 12-13 slices per layer.
  • Spread ⅔ cup of the filling (~7 oz.) over the zucchini layer. Spoon ½ cup of the tomato sauce and sprinkle with ⅓ cup of the mozzarella cheese.
  • Repeat the process four more times (5 layers in total), ending with the remaining tomato sauce and shredded mozzarella.
  • Cover with aluminum foil and bake for 30 minutes.
  • Remove the foil and bake for an additional 15 minutes so that the top will become bubbly brown. Let it cool for 15 minutes on the kitchen counter.
  • Garnish with some torn fresh basil leaves, slice and serve.

Notes

  • Yields: This recipe is made in a 9X13 baking dish that yields 9 slices of zucchini lasagna. The calorie and nutrition information below is per slice.
  • Ricotta Cheese: You can make your own ricotta or buy it from the store. However, be sure to drain any excess liquid before adding it to the mixture.
  • Excess liquid: If you have excess liquid in the baking dish after cooking, you can drain it out before serving. Letting the lasagne rest for 15 minutes will help the liquid set up. 
  • Make Ahead: First, assemble and bake the lasagna as instructed. Then, bring it to room temperature, drain any excess liquid, and place it in an airtight container. Store it in the refrigerator for up to three days. When ready to eat, reheat the lasagna in a 350-degree F. oven for 30 minutes or until it is thoroughly warmed.
  • Storage of leftovers: Bring the lasagna to room temperature, transfer it to an airtight container, and keep it in the refrigerator for up to three days. It is possible that it will develop extra moisture during storage, so feel free to drain it before reheating.
  • Reheat: Reheat it in a 350-degree F. oven for 10-15 minutes or until warm.
  • Freeze: If you want to freeze this dish, we recommend baking it first. Simply bring it to room temperature and cover it tightly with stretch film to avoid freezer burn. Transfer the covered dish to the freezer for up to a month.
  • Thaw: Thaw it in the fridge overnight. Be sure to drain any excess liquid before reheating. Then, place it in a 350-degree F. oven for 20-30 minutes or until heated through.

Nutrition

Calories: 269kcal | Carbohydrates: 11g | Protein: 16g | Fat: 18g | Saturated Fat: 9g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Trans Fat: 0.002g | Cholesterol: 66mg | Sodium: 619mg | Potassium: 520mg | Fiber: 3g | Sugar: 6g | Vitamin A: 2645IU | Vitamin C: 21mg | Calcium: 358mg | Iron: 2mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Additional Info

Course: Main Course
Cuisine: Italian
Tried this recipe?Mention @foolproofliving or tag #foolproofeats!

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About Aysegul Sanford

Hello Friend! I'm Aysegul but you can call me “Ice." I’m the cook/recipe-tester/photographer behind this site.

If you’re looking for approachable, yet creative recipes made with everyday ingredients, you’ve come to the right place. Here, we’re all about recipes that’s been meticulously tested to provide you with a truly foolproof cooking experience regardless of your level of cooking.

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5 from 2 votes (1 rating without comment)

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6 Comments

  1. Thank you so much for sharing. I just pinned this recipe and I will be making it for dinner tomorrow night. I really cannot wait to try it!!

    Reply

    1. Hi Michelle,
      I am so glad you liked it. We love it too.
      It is healthy, easy to make and delicious. 🙂
      Thank you so much for stopping by.
      Ice

      Reply

    1. Monica,
      I know you will love it. It is filling and very tasty!
      Hope all is well. Cheers! – Ice

      Reply

      1. 5 stars
        We made this tonight and we love it.. Can’t wait until lunch tomorrow to have the leftovers! It was very satisfying. To mix it up a bit next time we may add some mushrooms and a few fennel seeds, but it is perfect just as it is.

      2. Hi Monica,
        I am glad you liked it. It is our new favorite meal.
        I would have never thought of putting hard boiled eggs in a lasagna but I love how filling and delicious it ended up being.
        Fennel seeds is a good idea.
        Thank you! 🙂
        Cheers.
        Ice