Don't have breadcrumbs on hand? No problem! You can use crushed crackers or even crushed cornflakes for a crunchy topping.
Feel free to customize your casserole with your favorite herbs and spices. Basil, oregano, and red pepper flakes are all tasty additions!
Want to make it a complete meal? Add some cooked chicken, sausage, or shrimp to the mix for extra protein.