A deep-fried tortilla is a Mexican dish made by frying a tortilla in oil until it is crispy and golden. It is usually served with a variety of toppings such as cheese, salsa, guacamole, and sour cream. The term 'tostada' is used to describe the dish, which is derived from the Spanish word for toast. Deep-fried tortillas are a popular snack in Mexico and are often served as an appetizer or side dish.