Blood Plum Puree

Directions

1. 1
   Puree the plums in a food processor.
2. 2
   In a large, heavy pot, mix the plum puree with the sugar and bring to a boil over moderate heat, skimming as necessary.
3. 3
   Cook uncovered over low heat for 40 minutes, stirring occasionally.
4. 4
   Stir the orange and lemon juices and the orange zest into the plums; simmer until thickened, about 10 minutes longer.
5. 5
   Pour the plum puree into 5 hot sterilized 1-pint jars, stopping 1/4 inch from the top.
6. 6
   Wipe the glass rims and close the jars.
7. 7
   Set them in a water bath and bring to a boil.
8. 8
   Process for 20 minutes.