Quesadilla is a Mexican dish of melted cheese, often with other fillings, sandwiched between tortillas and cooked until the tortilla is toasted and the cheese melts. The name derives from the Spanish word queso (cheese); the dish likely developed after the Spanish colonial period, as cooks combined introduced cheese with native corn and wheat tortillas. Common fillings beyond cheese include sautéed vegetables, cooked chicken, beef, or pork, and beans; typical cheeses include cheddar, Monterey Jack, Oaxaca cheese, and queso fresco. Quesadillas are served as a snack, appetizer, or light main course, usually with salsa, guacamole, or sour cream on the side.