Italian Sausage Breakfast Casserole

1 pound Italian sausage
1 cup Cheddar cheese, shredded
4 cups hash brown potatoes
1/4 cup sun-dried tomatoes
1 cup frozen leaf spinach, thawed and drained
1 cup mozzarella cheese, shredded
4 eggs
3/4 cup milk
1/4 teaspoon salt
1/8 teaspoon pepper
2 tablespoons Parmesan cheese

Grease a 2-quart baking dish while preheating oven to 350 degrees.
In a large skillet over medium-high heat, cook the sausage until browned. Drain the grease.
Mix the Cheddar cheese and potatoes together in a medium bowl. Layer half the Cheddar-potato mixture, all of the sausage, tomatoes, spinach and remaining Cheddar-potato mixture. Top with all the mozzarella cheese.
Beat the eggs slightly in a medium bowl. Add the milk, salt and pepper and beat together. Pour as evenly as possible over the casserole. Cover with tin foil.
Bake for 60 to 70 minutes. Remove from oven, uncover and sprinkle the Parmesan cheese on top. Return to oven (uncovered) and bake for an additional 15 minutes.
Before serving, let stand for 5 minutes.