Preheat your oven to 350°F (175°C).
In a large skillet over medium heat, cook the lean ground turkey until browned, breaking it apart as it cooks.
Add in your chopped onion, tomatoes, peppers, and minced garlic. Sauté until softened.
Lower the heat and stir in cooked quinoa, tomato sauce, grated zucchini, chili powder, cumin, and half of the cheese until well combined.
Pour the mixture into a baking dish evenly and sprinkle the remaining cheese on top.
Place your assembled dish in the preheated oven and bake for about 20 minutes or until heated through and bubbly at the edges.