t may not be blueberry season, but there’s all kinds of great things you can do with frozen blueberries! And what could be better than a guilt-free lemon blueberry parfait? The tangy lemon is a nice foil for the sweetness of the berries, and dates and agave round out the sweetness. All you need is a few minutes and a food processor to make this delicious, relatively healthful blueberry parfait.