Sugar Free Blueberry Syrup --- Use a smidgen of xanthan gum (a little goes a loooong way) instead of corn starch. If more sweetening is needed add som erythritol. Two different sweeteners together make a truer sweet taste.
Homemade Blueberry Jam - that you don't need to can! "Refrigerator jam isn’t meant to can… it’s meant to eat within a couple of weeks." Great for when a deal on blueberries comes up at the local Farmer's Market!