Heat 1 tablespoon of butter in a 10 or 12-inch nonstick skillet with a lid over medium heat.

Add the spinach in. Put the lid on and let it cook for 3-4 minutes or until spinach starts to lose most of its volume. Add in the garlic, Tangy Bang sauce and season it with salt and pepper and and give it a stir. Transfer the now-fully cooked spinach onto a plate and set it aside. Clean the skillet with a paper towel and set it aside. No need to wash it.

To assemble the tortillas, lay 4 flour tortillas on a flat surface, add ½ cup shredded cheese on one half of each tortilla. Divide the cooked spinach amongst the tortillas mounting it onto the cheese. Fold the other half over the filling.

Place the skillet over medium heat. Brush each tortilla with melted butter and transfer 2 of them onto the skillet. Cook 1-2 minutes on each side (or until it turns golden brown). Once cooked, transfer them onto a cutting board to cool off. Repeat the same process with the rest of the quesadillas.

Slice them into wedges. If using, garnish with cilantro leaves. Serve with more Tangy Bang sauce and sour cream on the side for dipping.