Fold in sides. Starting at unfloded edge, roll up each leaf, making sure folded edges are included in roll. Arrange rolls in a shallow baking dish. Pour water over rolls. Cover with vented clear plastic wrap.
Transfer rolls to a plate.
Cover and keep warm. For sauce, in a 1-cup measure stir together 3 T apple juice or cider, cornstarch, and instant beef bouillon granules. Stir in the remaining chopped apple.