A
hamburger (also called a
beef burger,
hamburger sandwich,
burger,
hamburg or
cheeseburger when served with a slice of cheese) is a
sandwich consisting of one or more cooked
patties of
ground meat, usually
beef, placed inside a sliced
bread roll or
bun. Hamburgers may be cooked in a variety of ways, including pan-frying, barbecuing, and flame-broiling. Hamburgers are often served with
lettuce,
bacon,
tomato,
onion,
pickles,
cheese and
condiments such as
mustard,
mayonnaise,
ketchup,
relish, and
chiles.