Plus, not only do tater tot casseroles incorporate everyone's favorite freezer-friendly potato staple into a decadent breakfast casserole, but they can also be customized with add-ons and substitutions to fit the needs of your family. Think hash browns, but with a surprising, out-of-the-ordinary twist. If you've never heard of tater tot casseroles, get ready to have your taste buds rocked! Most Midwesterners are already aware of these mouthwatering dishes, but if you're unfamiliar, all you have to know about these quirky, potato-based dishes is that they are just as delicious and hearty as their name makes them sound.