1.Preheat Oven Broiler. 2.Mix Chili Sauce And Mayonnaise Until Smooth. Spread Mayonnaise Mixture And Butter On Bread Slices. Layer Corned Beef, Swiss And Sauerkraut On 4 Slices And Top With Remaining Slices. Place On Baking Sheet Under Preheated Broiler And Broil Until Browned, Turning Once, 2 Minutes.