Hash Brown Casserole
["1 bag frozen hash brown potatoes", "1 small onion, chopped fine", "1 (16 oz.) sour cream", "1 can cream of mushroom soup", "2 c. sharp Cheddar cheese", "1 stick margarine, melted", "salt and pepper to taste"]
["Mix together and bake at 400\u00b0 until brown and bubbly (approximately 40 to 45 minutes)."]
["potatoes", "onion", "sour cream", "cream of mushroom soup", "Cheddar cheese", "margarine", "salt"]