Whiskey-Glazed Pork Kebabs

1 cup diced onion

3 T. unsalted butter

3/4 cup ketchup

1/2 cup fresh orange juice

1/2 cup cider vinegar

1/2 cup Jack Daniels whiskey

1/3 cup packed brown sugar

1/4 cup molasses

2 T. Worcestershire sauce

Kosher salt and black pepper to taste

2 pork tenderloins, trimmed and cut into 3-inch cubes

2 chicken breasts, cut into cubes

1 large red onion, cut into wedges

1 red bell pepper, cut into small pieces

1 yellow bell pepper, cut into small pieces

Pineapple Chunks, optional

 

Sauté diced onion in butter in a saucepan over medium heat until soft, 4–5 minutes. Stir in ketchup, orange juice, vinegar, whiskey, brown sugar, molasses, Worcestershire, salt, and pepper. Bring mixture to a boil, reduce to a simmer, and cook 10 minutes. Let sauce cool slightly, then set aside half the sauce for serving. Thread pork and chicken cubes with peppers and red onion on skewers (pineapple if using); season with salt and pepper. Grill kebabs basting with half the sauce. Serve with remaining sauce.