Blueberry Sauce
["1 qt. grape juice", "2 to 4 Tbsp. arrowroot powder or cornstarch", "2 c. frozen blueberries"]
["Heat", "juice and arrowroot powder until thickened.", "Stir in blueberries and serve over toast or waffles."]
["grape juice", "arrowroot powder", "frozen blueberries"]