Tacos al Pastor

INGREDIENTS

• 1/4 cup chopped fresh cilantro
• 1 2 1/2-to 3-pound boneless pork loin, cut into 1/2-inch slices
• 1/2 cup fresh orange juice
• 1 teaspoon ground cumin
• Corn tortillas
• 1/4 cup guajillo chile powder
• 1 teaspoon dried oregano (preferably Mexican)
• 1 large or 2 small chipotle chiles and 1 to 2 teaspoons adobo from canned chipotle chiles in adobo
• 3 garlic cloves, halved
• 1 large white onion, halved
• 1/4 cup distilled white vinegar
• Lime wedges
• 1 pineapple, peeled, cut crosswise into 1/2-inch-thick rounds
• 2 teaspoons coarse kosher salt