PREHEAT oven to 350°F. Brown pork and onions in hot oil in large ovenproof pot on medium-high heat 3 min., turning occasionally.
COMBINE barbecue sauce, apple juice and thyme. Pour over ingredients in pot; cover with ovenproof lid. Simmer an additional 10 min., then place in oven.
BAKE 2 hours. Add apples and prunes; bake an additional 30 min. or until pork is cooked through and apples are tender.