The Reuben sandwich, a beloved staple in American delis, has a somewhat mysterious origin. One popular theory attributes its creation to Reuben Kulakofsky, a grocer from Omaha, Nebraska. It's said that he concocted this sandwich during a late-night poker game in the 1920s at the Blackstone Hotel. Another story credits Arnold Reuben, the owner of Reuben’s Delicatessen in New York City, with its invention in 1914. Despite the unclear origins, what's certain is that the Reuben sandwich has become a timeless classic, combining corned beef, Swiss cheese, sauerkraut, and Thousand Island dressing, all grilled between slices of rye bread.