Hot Reuben Dip
["3/4 c. mayonnaise", "6 oz. wafer-thin corned beef, shredded", "8 oz. Cheddar cheese, shredded", "8 oz. Swiss cheese, shredded", "1 (16 oz.) can sauerkraut, drained"]
["In a 2-quart casserole, mix all ingredients well.", "Cover and bake for 40 to 45 minutes at 250\u00b0.", "Serve hot with cocktail rye."]
["mayonnaise", "wafer-thin", "Cheddar cheese", "Swiss cheese", "sauerkraut"]