Indian summer sometimes yields a bumper crop of rhubarb. When it does, throw the rhubarb into this amazing tart/sweet biscotti. R.W. Knudsen’s unsweetened, pure juices are best for this biscotti that calls for a dip in juice and then sugar before its second bake. These are very intensely flavored juices that are great in baking. Try Knudsen’s Just Sour Cherry or Just Cranberry for this recipe (regular cranberry juice will work too) widely available and especially available in health food stores.