Some say the Reuben originated at the New York deli Reuben's, while. Mix mayonnaise and chili sauce. Spread over 6 slices bread. Place cheese, corned beef and sauerkraut on mayonnaise mixture. Top with remaining bread slices. Spread each top with 1 teaspoon margarine.Place sandwiches, margarine sides down, in skillet. Spread tops with margarine. Cook uncovered over low heat about 10 minutes or until bottoms are golden brown. Turn and cook about 8 minutes or until golden brown and cheese is melted. 6 Sandwiches; 610 Calories Per Sandwich.