A quiche is a savory tart or pie with an egg custard filling flavored with cheese and sometimes meat, seafood or vegetables. It is generally baked in a pie plate or quiche dish. Quiches originated in the Alsace-Lorraine region of France. Quiche Lorraine, which is flavored with bacon, is a well-known quiche. It contains no cheese. Other popular versions include Cheddar cheese and ham, Cheddar cheese and broccoli, and Swiss cheese and onion. Quiches are served as an appetizer or entrée.