Slow Cooker Tacos al Pastor

Slow Cooker Ingredients:

• ⅔ large pineapple - peeled, cored, and chopped into small chunks

• 1 small white onion, quartered

• 1 chipotle peppers in adobo sauce, or more to taste

• 2 dried guajillo chiles, stemmed and seeded, or more to taste

• 1 dried chile de arbol pepper, stemmed and seeded, or more to taste

• 3 cloves garlic, halved

• 1 tablespoon minced fresh oregano

• ½ cup orange juice

• 2 tablespoons white vinegar

• 2 tablespoons achiote powder

• 2 teaspoons salt

• 1 teaspoon ground cumin

• 1 teaspoon lime zest, or to taste

• ½ teaspoon ground ancho chile powder

• ¼ teaspoon freshly ground black pepper

• 1 (3 pound) boneless pork loin, cubed

Taco Ingredients:

• 1 tablespoon canola oil, or more as needed

• 20 (6 inch) corn tortillas

• ½ cup diced fresh pineapple

• ½ cup chopped fresh cilantro

• ⅔ white onion, diced