Al pastor, meaning literally "shepherd style," is a traditional way to prepare pork, lamb, and goat meat that originated in northern Mexico. Historically, pigs and goats were slow-roasted whole over a mesquite fire, but over time preparation methods evolved. In Mexico city there are taquerias dedicated mostly or even exclusively to tacos al Pastor. Tacos al Pastor are made from pork meat that has been marinated in a secret recipe and then cooked in a rotisserie with pineapple on top. Similar to the roast lamb from Greek delis, taquerias stack the marinated pork al pastor into a large cylindrical heap and cook it on a vertical spit. The tacos should be very small (almost like 2 bites size) and garnished with cilantro (coriander), chopped onion and the pineapple. Add your favorite hot sauce (if desired). I haven't tried this myself, just thought it would make a good contribution to Recipezaar. Marinating time not included in preparation time.