Pork is marinated in a combination of dried chiles, spices and pineapple. In some places achiote is also added, and then slowly cooked with a gas flame on a vertical rotisserie called a trompo (lit: spinning top), very similar to how shawarma is cooked, with a piece of fresh onion and a pineapple on top.When ready, the meat is then thinly sliced off the spit with a large knife. It is served on small tortillas, with finely chopped onions, cilantro, and occasionally, a small slice of pineapple, and usually topped with some lime juice and hot salsa. This meat is a common ingredient in not just tacos, but also gringas, alambres, huaraches, tortas and pizza.