Directions
Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with cooking spray or a little oil.

In a large skillet over medium heat, cook the breakfast sausage, breaking it up with a spatula, until it is browned and cooked through. Drain off any excess grease if it looks very oily.

Spread the thawed or partially thawed hash browns evenly in the bottom of the prepared baking dish. Use your hands or a spatula to gently press them into an even layer.

Sprinkle the cooked sausage evenly over the hash browns so every bite gets a bit of everything.

Top the sausage with the shredded cheese, spreading it all the way to the corners for a nice cheesy crust.

Cover the dish loosely with foil and bake for 20 minutes. Remove the foil and continue baking for another 10–15 minutes, or until the cheese is melted, bubbly, and lightly golden around the edges and the casserole is heated through.

Let the casserole rest for about 5 minutes before slicing. This helps it set up a bit so you can cut neat squares. Serve warm, straight from the baking dish.

Variations & Tips

To keep this in the 3-ingredient spirit but still make it your own, you can play around with the type of sausage and cheese. Try spicy breakfast sausage for a little kick, or use turkey sausage if you want something lighter. Swap cheddar for pepper jack if your crew likes things a bit zesty, or use a smoked cheese for a deeper flavor. If you’re okay bending the 3-ingredient rule, you can add a few extras without much effort: whisk 4–6 eggs with a splash of milk, pour over the hash browns before adding sausage and cheese, and bake as directed for a more traditional breakfast bake. You can also stir in a handful of chopped green onions, bell peppers, or spinach with the sausage to sneak in some veggies. For meal prep, cook the sausage the night before and keep it in the fridge; in the morning, just assemble, bake, and you’re done. Leftovers reheat well in the microwave or oven and make an easy grab-and-go breakfast for busy weekdays.