1. Make Easy Al Pastor Marinade: Blend 1 1/2 cups Pineapple, 1 White Onion, 6 Garlic Cloves, 3 tbsp Achiote Paste, 2 tbsp Oregano, 1 tsp Cinnamon, 3 tbsp Guajillo Pepper Powder, 3 tbsp Ancho Chili Powder, 3 tbsp Chipotle Powder, 1/4 cup White Vinegar, 3/4 cup Pineapple Juice, and 3/4 cup Orange Juice until smooth.
2. Slice Chicken Thighs into even-sized chunks, then marinate in the Al Pastor Marinade for 3 hours.
3. Make Pickled Onion & Jalapeños: Combine 2 Red Onions, 4 Jalapeños, 1 cup White Vinegar, 1 cup Water, 4 tsp Sugar, 1 tbsp Salt, and 2 tbsp Peppercorns. Heat the ingredients until the sugar and salt are dissolved. Cover and refrigerate overnight.
4. Add the marinated Chicken Thighs to skewers.
5. Preheat your grill to High, and grill the Chicken Skewers until they reach an internal temperature of around 175°F.
6. Serve the Al Pastor Chicken Skewers with the Pickled Onions & Jalapeños. Pair with your side of choice, such as white rice.
7. Enjoy! This recipe is great for meal prep.