The term 'Mexican Sandwich' refers to two popular Mexican dishes: the taco and the torta. A taco is a traditional Mexican dish consisting of a corn or wheat tortilla filled with various ingredients such as meat, cheese, lettuce, tomatoes, and salsa. A torta is a Mexican sandwich made with a type of bread called telera, which is usually filled with meats, cheeses, and vegetables. Both dishes are popular in Mexico and have become popular around the world.