1 pineapple, peeled, cut crosswise into 1/2-inch-thick rounds
1/2 cup fresh orange juice
1/4 cup distilled white vinegar
1/4 cup guajillo chili powder
3 garlic cloves, halved
2 teaspoons coarse kosher salt
1 teaspoon dried oregano (preferably Mexican)
1 teaspoon ground cumin
2 small chipotle chiles or 1 large chipotle chile
1 -2 teaspoon adobo sauce, from canned chipotle chile in adobo
2 3/4 lbs boneless pork loin, cut into 1/2-inch slices
1/4 cup chopped fresh cilantro
corn tortilla
salsa
Steps:
Coarsely chop 1 onion half. Coarsely chop 2 pineapple rounds, discarding core; cover and chill remaining pineapple. Place chopped onion and chopped pineapple in blender. Add orange juice and next 7 ingredients; puree marinade until smooth. Place pork in large resealable plastic bag. Add marinade and seal bag, releasing excess air. Turn to coat. Chill at least 4 hours and up to 1 day.
Prepare barbecue (medium-high heat). Grill remaining pineapple until warm and slightly charred, 4 to 6 minutes per side. Grill pork with some marinade still clinging until slightly charred and cooked through, 2 to 4 minutes per side. Transfer pineapple and pork to work surface; chop pineapple into 1/2-inch cubes, discarding cores. Chop pork. Transfer to platter; toss to combine.
Meanwhile, finely chop remaining onion half and place in medium bowl. Add cilantro; toss to combine. Grill tortillas until warm and slightly charred, about 10 seconds per side.
Serve pork-pineapple mixture with onion-cilantro relish, Salsa, and lime wedges.
