Reuben

Reuben is a melty sandwich consisting of a combination of corned beef, rye bread, sauerkraut, Russian dressing, and Swiss cheese. According to one out of many theories, it was invented in 1914 at Manhattan's Reuben Delicatessen by its owner, Arnold Reuben, when an out-of-work actress ordered something new, and Arnold made her a Reuben sandwich.

The combination of meat and cheese is not kosher, but the sandwich can be found in Jewish delis because it's a part of Jewish food culture and it's mostly eaten by people who are not strictly Orthodox. Just like most popular food, Reuben also has numerous variations such as Rachel sandwich, grouper Reuben, West Coast Reuben, Montreal Reuben and Reuben egg rolls.