Tender pork shoulder marinated in a blend of guajillo chiles, adobo sauce, achiote paste, and pineapple juice, then baked and broiled to perfection. Serve with warm tortillas for authentic Tacos Al Pastor.
Place the dried Guajillo chilies into a saucepan with a lid and set aside for 20 minutes or until the chilies have softened.
Remove the chilies from the water and pat dry with paper towels to remove excess water. Carefully remove the stems and seeds from the chilies. Set them aside.
Place the prepared chilies into a food processor or large blender and add the remaining marinade ingredients. Blend on high speed until they resemble a thick paste. Set it aside.
Cut the pork shoulder into bite-size pieces and place into a large mixing bowl.
Pour the marinade over the pork and toss to combine. Cover the bowl with a lid or plastic wrap. Refrigerate the sauce-covered pork for 6 hours or overnight for up to 24 hours. Remove the pork from the fridge 30 - 60 minutes before cooking.
When ready to cook, preheat the oven to 450°F/230°C/Gas 8 and place the marinated pork onto a large baking pan with a rack. Bake in the hot oven for 30 minutes.
Meanwhile, cover a baking pan with foil and set it aside.
Remove the pork from the oven and transfer it to the prepared baking pan. Pour any pan juices over the pork.
Set your broiler/grill to medium-high heat and cook the pork for 5-10 minutes to char the meat, turning as required.
Serve the al pastor pork with soft tortillas or taco shells and your choice of taco toppings. Enjoy!