What is a submarine sandwich?

A submarine sandwich, also known as a sub, hoagie, hero, or grinder, is a type of sandwich made on a long, cylindrical roll or baguette-shaped bread. The sandwich typically includes a variety of deli meats (such as ham, salami, turkey, and roast beef), cheese, lettuce, tomato, and condiments such as mayonnaise, mustard, and oil and vinegar dressing. The origin of the submarine sandwich is often credited to Italian immigrants in the United States, who would make sandwiches using traditional Italian ingredients and bread. The sandwich can be customized to personal taste preferences and can be served hot or cold.