Hash Brown Casserole
["1 lb. frozen hash brown potatoes, thawed", "1/2 stick margarine (room temperature)", "1/2 c. chopped onion (optional)", "1 can cream of chicken soup", "1 1/2 c. shredded Cheddar cheese", "1 c. sour cream", "salt and pepper to taste"]
["Mix.", "Pour into large baking dish.", "Top with mixture of crushed corn flakes or potato chips and melted butter.", "Cover. Bake at 400\u00b0", "for 1 hour.", "Leave, covered, until last 10 to 15 minutes.", "This can be made ahead and refrigerated overnight before cooking."]
["frozen hash brown potatoes", "margarine", "onion", "cream of chicken soup", "Cheddar cheese", "sour cream", "salt"]