Follow these steps to create your own Savory Ground Turkey Zucchini Casserole:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Cook Turkey: In a large skillet, heat olive oil over medium heat. Add ground turkey and cook until browned, about 5-7 minutes.
3. Add Aromatics: Stir in the diced onions and minced garlic. Sauté for an additional 2-3 minutes until the onions become translucent.
4. Mix Ingredients: Add sliced zucchini and diced tomatoes to the skillet. Season with Italian seasoning, salt, and pepper. Stir well to combine.
5. Simmer: Allow the mixture to simmer for about 5 minutes until zucchini slightly softens.
6. Layer Casserole: Transfer the turkey mixture to a casserole dish. Spread it evenly across the bottom.
7. Add Cheese: Sprinkle shredded mozzarella cheese over the turkey and zucchini mixture.
8. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes until the cheese is bubbly and golden.
9. Garnish: If desired, sprinkle chopped fresh basil over the top before serving.
10. Cool: Allow the casserole to cool for about 5 minutes before slicing.

Following these steps will guide you in creating an amazing Savory Ground Turkey Zucchini Casserole that will surely become a staple in your household!