Tacos al Pastor is a popular street food in Mexico City. This dish consists of thinly sliced pork that has been marinated in a mixture of spices, including achiote, pineapple, and various chili peppers. The meat is then cooked on a vertical spit called a trompo and sliced off to order. Tacos al Pastor are typically served on small corn tortillas and topped with onions, cilantro, and pineapple.