A sanwich is a food item made of two or more slices of leavened bread with one or more layers of filling, typically meat or cheese, with the addition of vegetables or salad. The bread can be used as is, or it can be coated with butter, oil, mustard or other condiments to enhance flavor and texture. In North American usage, sandwich may also refer to what is more commonly referred to in the rest of the world as a hamburger.