Wikipedia defines AL PASTOR :
Al pastor (from Spanish, “shepherd style”), is a preparation of spit-grilled slices of pork originating in the Central Mexican region of Puebla, although today it is a common menu item found in taquerias throughout Mexico. The method of preparing and cooking al pastor is based on the lambshawarma brought by Lebanese immigrants to the region.Al pastor features a flavor palate that uses traditional Mexican adobada (marinade). It is a popular street food that has spread to the United States. In some places of northern Mexico and coastal Mexico, such as in Baja California, Mexico, it is known as taco de trompo or taco de adobada. A similar dish also from Puebla that uses a combination of middle eastern spices and indigenous central Mexican ingredients is called tacos árabes.