Step 1

Combine barbecue sauce, pineapple juice, garlic, salt, and fresh ground pepper in a bowl; whisk until thoroughly incorporated.

Step 2

Combine cut up pork, pineapples, peppers, and onions in a mixing bowl; season with adobo seasoning, salt, and pepper, and toss to combine.

Step 3

Preheat grill to medium-high.

Step 4

Thread pork onto skewers, alternating with onions, pineapples, and peppers.

Step 5

Reserve 1/2 cup prepared barbecue sauce for serving; brush skewers with remaining barbecue sauce.

Step 6

Grill skewers for 8 to 10 minutes, turning occasionally, or until pork is thoroughly cooked and vegetables are tender and charred.

Step 7

Transfer to a platter and brush lightly with barbecue sauce.

Step 8

Serve with remaining barbecue sauce on the side.