It was probably invented by two Austro-Hungarian citizens, Emil Reichel and Sam Ladany, after they migrated to Chicago. They started selling their dish at the 1893 World’s Fair. Nowadays it is known as a classic Chicago hot dog. It’s made from all-beef sausage in a poppy bun, with green tomato-based relish, tomatoes, pickles, and onions, topped with mustard. Reichel and Ladany’s meat processing company, called Vienna Beef, operates constantly, and still uses the original recipe.
