1. Place blueberries in a small saucepan, and mash with a potato masher. Add white wine vinegar, 2 tablespoons sugar, and bay leaf to pan, and bring to a boil. Cover, reduce heat, and simmer for 10 minutes. Remove from heat; cover and let stand for 4 hours. Strain mixture through a fine sieve, and discard solids. Cover and chill.