Potato Casserole
["2 lb. bag frozen hash brown potatoes", "1/2 c. melted margarine", "1 1/2 tsp. salt", "1/3 tsp. pepper", "1 can cream of chicken soup", "1/2 c. finely chopped onion", "1 (9 oz.) carton sour cream", "10 oz. sharp grated cheese"]
["Mix all ingredients and put in 9 x 13 x 2-inch baking dish. Sprinkle with Parmesan cheese, then top with 2 cups of crushed Ritz crackers and 1/2 cup melted margarine.", "Bake 1 hour at 150\u00b0."]
["potatoes", "margarine", "salt", "pepper", "cream of chicken soup", "onion", "sour cream", "grated cheese"]