Creating your Savory Ground Turkey Zucchini Casserole is simple. Follow these step-by-step instructions to ensure success:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Cook the Turkey: In a large skillet, heat the olive oil over medium heat. Add chopped onion and minced garlic, sauté for about 2-3 minutes until softened.
3. Brown the Turkey: Add ground turkey to the skillet. Cook until browned and cooked through, approximately 5-7 minutes. Season with salt, pepper, and Italian seasoning.
4. Layer Zucchini: In a greased 9×13-inch casserole dish, layer half of the sliced zucchini at the bottom.
5. Add Turkey Mixture: Spread half of the cooked turkey mixture evenly over the zucchini layer.
6. Add Marinara Sauce: Pour half of the marinara sauce over the turkey.
7. Repeat Layers: Layer the remaining zucchini, followed by the remaining turkey mixture and marinara sauce.
8. Top with Cheese: Sprinkle shredded mozzarella and grated Parmesan cheese on top.
9. Bake: Cover the casserole with foil and bake for 25 minutes. Remove the foil and bake for an additional 10-15 minutes until the cheese is bubbly and golden brown.
10. Cool and Serve: Let the casserole cool for a few minutes before slicing and serving.

By following these steps, you’ll create a wonderful dish that checks all the boxes for flavor, health, and satisfaction.