This Blueberry Sauce, or Blueberry Coulis, is a silky smooth and vibrant sauce made of fresh or frozen blueberries.  Sweet, tangy, and intensely blueberry, it's a perfect topping for cheesecake, cakes, pancakes, waffles, or ice cream. This Blueberry Sauce is a coulis, a sauce made of puréed blueberries. Fresh or frozen blueberries are combined with sugar and