Preheat oven to 350˚F.
In a large skillet over medium heat, cook the ground turkey and onion, breaking it apart with a spatula as it cooks.After 1-2 minutes add the bell peppers and fresh garlic, and continue to cook until no longer pink- about 4-6 minutes.
Add the fire roasted tomatoes, marinara sauce, Italian seasoning, garlic powder, salt, black pepper and stir to combine. Then add the spinach and continue to cook, stirring occasionally until the spinach is wilted, then stir in the rice.
Transfer the mixture to a large casserole dish (9x13 inch). Then cover the top with the mozzarella cheese.Bake for 20-30 minutes or until the edges are bubbly and the cheese is melted.
Garnish with fresh parsley and serve warm.