Reuben purveyors are DELIS, which are establishments that specialize in the sale of prepared sandwiches, salads, and other food items. DELIS are often associated with Jewish cuisine, and the Reuben sandwich is a classic example of this type of food. The sandwich is made with corned beef, Swiss cheese, sauerkraut, and Russian dressing, all served on rye bread. DELIS are a popular destination for those looking for a quick and tasty meal.