16 oz. container sour cream
1 med. onion, chopped
1 qt. drained sauerkraut
2 (4 oz.) pkg. corned beef, chopped
8 - 12 oz. grated Swiss cheese
4 slices rye bread crumbs
1 stick butter, melted

Mix sour cream and onion. Spread in bottom of 9 x 13 inch pan. Layer with corned beef and sauerkraut. Add Swiss cheese. Top with bread crumbs. Drizzle with butter. Bake at 350 degrees for 45 minutes.