Potato Casserole - cooking recipe

Ingredients

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

Preparation

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.