To make sauce:Combine
ingredients in a medium saucepan. Bring to a boil over medium heat; reduce
heat and simmer until thickened, about 45 minutes. Divide sauce between 2
bowls. Set aside.
grill to medium. Season pork with salt and pepper. Sear, turning to cook
all sides, 10 to 15 minutes. Brush with half the barbecue sauce, turning
frequently, until pork is thoroughly glazed, about 10 minutes more (a meat
thermometer should read about 150 degrees). Set aside and let rest 5
minutes. Carve crosswise; serve with remaining barbecue sauce.