Brown your meat in a large skillet until it is fully browned. Drain excess fat.
Lightly grease a 9x13 baking dish and spread the hash browns evenly on the bottom of the dish.
Next, put the cooked meat mixture on top of the hash browns. If you have ham or bologna, you can add it to the egg mixture instead to incorporate.
In a medium bowl, whisk the eggs, milk, salt, and pepper
Pour the egg mixture over the meat mixture and add a generous helping of cheese on top
At this point you can cover your casserole with tin foil and refrigerate until you are ready to use it tomorrow.
When you are ready to bake preheat your oven to 375 °F and bake covered for 20 minutes. Remove foil and bake for another 15-20 minutes until the center is set and the chese is melted and lightly golden.
Let the casserole rest for 5–10 minutes before slicing. This helps it set and makes it easier to cut into clean pieces.
