8 slices Swiss cheese chopped
8 slices American cheese chopped
1 small can Sauerkraut drained
1 large can pitted black olives chopped
3 6-8 oz. pkg. chopped beef
1 c. mayonnaise

Mix all ingredients together. Place in a 1 1/2 - 2 quart baking dish. Bake uncovered at 350° for 20 minutes. Serve on cocktail bread.