Ingredients

• cooking spray (such as Pam®)
• 4 zucchini, horizontally and thinly sliced
• salt and ground black pepper to taste
• 1 (16 ounce) jar marinara sauce
• 1/2 cup grated Parmesan cheese
• 1 cup shredded part-skim mozzarella cheese

Instructions

1. Preheat oven to 350 degrees F (175 degrees C). Spray a 9x13-inch baking dish with cooking spray.
2. Season both sides of zucchini slices with salt and pepper.
3. Spray a non-stick skillet with cooking spray and place over medium-high heat; cook and stir zucchini slices until lightly browned, 2 to 3 minutes per side.
4. Spread 1/2 cup marinara sauce in the prepared baking dish. Layer zucchini slices, overlapping slightly, on top of marinara layer. Spread 1/2 cup marinara sauce over zucchini layer; top with 1/4 cup Parmesan cheese and 1/4 to 1/2 cup mozzarella cheese.
5. Continue layering zucchini, 1/2 cup marinara, 1/4 cup Parmesan cheese, and remaining mozzarella cheese.
6. Bake in the preheated oven until cheese is melted, about 10 minutes.