Deann's Easy Breakfast Casserole

Anna's activity days leader made this for a recent recognition day breakfast. I've made it for my family twice since then. It's a keeper.

Ingredients:
1/2 pound spicy or mild pork sausage (I used Bacon)
1 medium onion, chopped
4 cups frozen diced hash brown potatoes, thawed (about 16 ounces)
1 1/2 cups shredded Monterey Jack or Cheddar cheese
3 eggs, beaten
1 cup milk
1/4 teaspoon pepper
**of course, I add garlic to taste
mild salsa, optional

Preparation:
In a large skillet, cook sausage and onion, breaking up sausage with a spatula. When sausage is cooked through, drain off excess fat.
In an 8x8x2-inch square baking dish, layer the hash brown potatoes, half of the shredded cheese, browned sausage and onion mixture, and remaining shredded cheese.
In a bowl, combine eggs, milk and pepper; pour egg mixture over cheese.
Bake, covered, in a 350° oven for 45 to 55 minutes or until a knife inserted near center comes out clean. Transfer casserole to a wire rack and let stand for 10 to 15 minutes.
Cut into squares. Serve with salsa, if desired.