Tacos Al Pastor

Literally meaning "shepherd's-style tacos", these are a Mexican adaptation of Middle-Eastern spit-grilled meat, brought by immigrants from Lebanon.
Made with thinly sliced pork marinated in herbs and spices and stacked on a vertical spit in the form of a trompo, or "top", so called because of its resemblance to a child's toy top. Narrow end on the bottom and a slice of pineapple at the top. The meat is turned in front of a vertical gas flame, shaved off as the outside gets done, and made into tacos.