hmmm - just found this recipe...
Blueberry Catsup
5 c Fresh Blueberries
1 c Sugar
1 tb Fresh Lemon Juice
1 ts Ground Cinnamon
1/2 ts Ground Cloves
1 ts Fresh Ground Black Pepper
1/2 ts Salt -- Or To Taste
3/4 c Vinegar
combine and simmer until thick.