A hamburger,beefburger or burges is a sandwich consisting of one or more cooked patties of ground meat, usually beef, placed inside a sliced bread roll or bun, The patty may be pan fried, barbecued,or flame broiled.or flame broiled.Hamburgers are often served with cheese, lettuce, tomato,bacon,onion,pickles ,or chiles; condiments such as mustad, mayonnaise,ketchup,relish,or "special sauce": and are frequentiy placed on sesame seed buns,A Hamburger topped with cheese is called a cheeseburger.