Au Gratin Potatoes
["2 lb. hash brown potatoes, thawed", "1/2 c. chopped onion", "1 can cream of chicken soup", "1 pt. sour cream", "1 stick margarine, melted", "8 oz. (2 c.) shredded Cheddar cheese"]
["Mix and put in a greased 9 x 13-inch pan.", "Bake at 375\u00b0 for 1 hour.", "Serves 12."]
["hash brown potatoes", "onion", "cream of chicken soup", "sour cream", "margarine", "Cheddar cheese"]