3 cups fresh blueberries
¼ cup minced onion
1 tablespoon grated fresh gingerroot
1/3 cup apple cider vinegar
½ cup brown sugar
2 tablespoons cornstarch
Combine all ingredients, bring to boil over medium heat, stirring frequently. Boil 1 minute and remove cinnamon stick.
Cool, cover well and refrigerate. This makes a lot - you'll definitely have some left over. Just freeze in small quantities.