A burger is a cooked patty of ground meat or plant-based substitutes served between two halves of a bun, often with various garnishes like lettuce, onion, and cheese. The term is a shortened form of "hamburger," originally referring to a patty of ground beef from Hamburg, Germany, but now encompasses a wide variety of patty types and has become a globally popular sandwich.The central component is a cooked patty, typically made from ground beef, chicken, turkey, or plant-based ingredients.