Blueberries are in! and here are 6 ideas for you to use’m…. Blueberry Port Sauce (for red meats), Blueberry Orange Sauce (for poultry), Blueberry Sweet-Spiced Pudding, Blueberry Vinegar (for fish, salads), a soured dip for a Fish Frittata and last, but not least – Frozen blueberries.