The duck was cooked slowly in its own fat to make a delicious confit.

confit 来自法语，原指"蜜饯"，在烹饪中指"用油脂慢煮保存食物"的烹饪方法。这个词特指将肉类（通常是鸭、鹅或猪肉）浸在自身的油脂中低温慢煮，使肉质变得酥软并能长期保存的烹饪工艺。