Heat oven to 400@. Mix hot water & margarine in a bowl, stir in stuffing mix, pepper and 1/2 of the pineapple & 1/2 of the juice. Spoon mix evenly on the chicken; roll tightly, secure with toothpicks. Place in 9x9 casserole with remaining stuffing in center of dish. Mix remaining pineapple, juice, sugar, vinegar & ginger. Spoon over chicken. Bake 30 minutes or until totally cooked.