Foie gras (French for "fat liver") is the fattened liver of a duck or goose, and it can be enjoyed in pâtés, terrines, pies, or simply sliced and seared on its own. To produce foie gras, the ducks or geese are said to be "force fed" via a tube full of grain down their throats, leading their livers to swell many times beyond their original size.