Remove the stems and seeds from the dried chilies.
Place the chilies in a sauce pan with the garlic, onion, cinnamon stick, oregano and cover with water. Bring the water to a simmer and cook for 15-20 minutes until the chilies are soft.
Transfer the chilies and veggies from the water to a blender. Throw out the cinnamon stick and save about 1 cup of the water.
To the blender, add achiote paste, salt, pineapple juice and 1 cup of water from the chilies. Blend everything together until smooth.
Cut the boneless pork shoulder into smaller chunks. Drizzle olive oil and season with the taco and all purpose seasonings.
Preheat the grill to 400 degrees Fahrenheit and set up for direct heat. Place the seasoned pork directly on the grates and sear 2-3 minutes per side. Continue flipping until you get a nice dark crust on all sides without burning it.
In a dutch oven add the pork, 1 stick of butter, adobo sauce, close the lid and put it back on the grill. Cook over indirect heat 2-3 hours or until the meat is fork tender.
Carefully, with heat resistance gloves, start shredding the pork pieces. Keep it in the adobo sauce, but remove any fatty pieces.
Assemble the Pulled Pork Tacos al Pastor with some warm tortillas, pulled pork, chopped white onion and cilantro. Enjoy!
Notes
Canned pineapple is a great way to guarantee soft and sweet pineapple chunks and juice.
If you are not a fan of corn tortillas, swap them for the street flour ones. They are the single serve size.