Recipe: Company Breakfast Casserole

-oz. pkg. shredded frozen hashbrowns, thawed and divided

onion, chopped and divided

ground pork sausage, browned and drained

green pepper, chopped

-oz. can sliced mushrooms, drained

to 1 cup shredded Cheddar cheese, divided

doz. eggs, beaten

milk

Salt and pepper

Optional: garlic salt