Potato Casserole
["1 (2 lb.) pkg. frozen hash brown potatoes, thawed", "1 (16 oz.) carton sour cream", "1 (10 1/4 oz.) can cream of celery soup", "1 c. sharp Cheddar cheese, grated", "1/2 c. margarine, softened", "1 tsp. salt", "1 tsp. pepper", "1 small onion, chopped (optional)", "1/2 c. (rounded) Ritz cracker crumbs"]
["Mix all ingredients except cracker crumbs.", "Pour in lightly buttered 13 x 9 x 2-inch baking dish.", "Sprinkle crumbs on top and bake at 350\u00b0 for 40 minutes."]
["frozen hash brown potatoes", "sour cream", "cream of celery soup", "Cheddar cheese", "margarine", "salt", "pepper", "onion", "cracker crumbs"]