1 c. blueberries
2 c. white vinegar
2 tbsp. sugar

Place blueberries in a sterilized 1-quart glass jar. Combine vinegar and sugar in a non-aluminum saucepan over high heat. Cover and bring to a boil. Remove from heat and pour vinegar mixture over blueberries. Cover and let stand at room temperature for 3 days. Strain blueberry mixture through several layers of damp cheesecloth into jars; discard blueberries.