1 qt Washed, stemmed blueberries
1/4 c  Cider vinegar
2 c  Sugar
1/4 ts Allspice
1/4 ts Cinnamon
1/4 ts Clovers

Combine and simmer till the skins are tender and desired thickness is
reached. [NOTE: BLUEBERRIES ARE VERY LOW IN PECTIN. YOU CAN HELP
THIS BY ADDING A FEW SLICES OF GREEN APPLE, REMOVING WHEN THEY BECOME
MUSHY. OR YOU CAN THROW IN A CUBE OF PECTIN STOCK – RECIPE FOLLOWS]

If you dont add pectin, it will be a bit runny but delicious
nonetheless, especially on scones or English muffins. Adding some
less-ripe berries makes for a more interesting flavor, in my opinion.