Authentic Tacos al Pastor

Ingredients

• 1 tomato
• 3 dried guajillo chile peppers seeded
• 2 dried ancho chile peppers seeded
• 1 pineapple sliced 3/4-inch thick
• ½ cup orange juice
• 1 onion quartered
• ¼ cup white vinegar
• 2 chipotle peppers in adobo sauce
• 1 tablespoon salt or to taste
• 2 cloves garlic crushed
• 3 cloves
• 1 teaspoon cumin seeds
• 1 teaspoon dried oregano
• 2 pounds boneless pork loin thinly sliced
• ½ cup chopped onion
• ½ cup chopped fresh cilantro