Heat oven to 350 F.
In large skillet over medium heat, add turkey, onions, salt and pepper. Break up turkey and cook until browned.
Add turkey mixture to 9-by-13-inch baking dish. Add bell peppers, crushed tomatoes, brown rice, oregano and garlic powder. Mix until combined. Cover with aluminum foil. Bake 80-90 minutes until rice is tender.
Remove foil, add shredded cheese and bake 5 minutes until cheese is melted.