The swap of the blackberry for the tomato completely transforms this ketchup. There's still the expected kick from vinegar and the traditional punch of the spice blend, but the blackberry lends it an almost jammy, even slightly sour quality.
Shaped like a gooseberry, dark like a currant, the Jostaberry is a hybrid of the two. Halfway between its parents in sweetness,it has tons of pectin so no added pectin is required. Cooks up quick too. From Balsam Farms, East Hampton