Preheat Blackstone griddle to medium-high heat. Drizzle vegetable oil onto the griddle top and add the pork and half of the diced onions. Season with salt and all the taco seasoning.
Cook the pork on the griddle for 5 minutes and then add the pineapple tidbits. Use spatulas to mix thoroughly on griddle top. Cook for an additional 5 minutes. The pork strips should have crispy edges and the pineapple will be slightly caramelized.
Turn your griddle to low heat and remove the Al Pastor mix from the griddle top. Lay the tortillas out onto the griddle and heat for 20-30 seconds per side. Place the tortillas onto a plate or into a tortilla warmer.
Serve the tacos and top with the remaining diced onion and cilantro.
