A tostada is a Mexican dish made with a flat, crispy corn tortilla that is typically layered with mashed or refried beans, protein, cheese, and toppings such as lettuce, tomatoes, salsa, and avocado). The name "tostada" quite literally means "toasted" and refers to dishes made over crispy flat tortillas that are either oven-toasted or fried. While the exact origin of tostadas is uncertain, they have been a staple of Mexican cuisine for centuries and are prepared all over the country. Tostadas are a versatile dish, and the toppings are unlimited, making them a blank canvas for creativity. They can be made with shredded beef, pork, or chicken, and vegetarian options are also available). In Mexico, tostadas are usually served as an appetizer or a side dish, and they can be found on the streets, in homes, or at restaurants). Due to the fragile nature of a tostada, the main topping (usually beans or cream) must be pasty enough to stay on, keeping the other toppings or garnishes from falling off while being eaten).