This healthy taco casserole is a delicious and nutritious twist on a classic Mexican dish. It is packed with lean ground turkey, black beans, corn, and a variety of flavorful spices. The casserole is topped with a layer of melted cheese and served with fresh toppings like avocado, salsa, and cilantro. It is a satisfying and filling meal that is perfect for a weeknight dinner or a potluck gathering. Plus, it can be easily customized to suit your taste preferences by adding or omitting ingredients.