Creating Savory Ground Turkey Zucchini Casserole is a breeze when you follow these steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Cook Turkey: In a large skillet, heat the olive oil over medium heat. Add the chopped onion and garlic, sautéing until softened, about 3 minutes.
3. Add Ground Turkey: Add the ground turkey to the skillet, cooking until browned and fully cooked, approximately 5-7 minutes. Use a spatula to break apart the meat as it cooks.
4. Season Meat: Stir in the Italian seasoning, salt, and pepper. Mix well to ensure seasonings are evenly distributed.
5. Add Zucchini and Tomatoes: Fold in the sliced zucchini and diced tomatoes, allowing them to cook for an additional 5 minutes until the zucchini starts to soften.
6. Layer Casserole: Transfer the turkey and vegetable mixture into a baking dish, spreading it evenly.
7. Top with Cheese: Sprinkle the shredded mozzarella and grated Parmesan cheese evenly over the top of the turkey mix.
8. Bake: Place in the oven and bake for 25-30 minutes or until the cheese is melted and bubbly, and the edges are slightly golden.
9. Garnish and Rest: Once baked, remove from the oven and let it rest for 5-10 minutes before serving. Garnish with fresh basil or parsley if desired.

Following these steps will result in a wonderfully savory ground turkey zucchini casserole that is sure to please those at your dining table!