Craving the flavors of stuffed peppers without the hassle? This Gluten-Free Unstuffed Pepper Casserole has you covered! Ground beef (or turkey), sautéed onions, and bell peppers are simmered in tomato sauce and combined with rice and a blend of savory spices. Topped with melted cheddar cheese and baked until bubbly, it’s the perfect one-pan comfort meal.