Chinese Plum Sauce

We have a plum tree. Or maybe it's an Italian Prune tree. Either way - the fruit looks pretty plummish to me. I was able to scavenge a whole big bowlful before the wasps and birds got to them this year. I was pretty proud of myself. I found this recipe online at recipezaar.

Chinese Plum Sauce
8 cups plums, pitted, halved
1 cup onions, chopped
1 cup water
1 tsp dried ginger
4 cloves garlic, minced
3/4 cup sugar
1/2 cup rice OR cider vinegar
1 tsp ground coriander
1/2 tsp salt
1/2 tsp cinnamon
1/4 tsp cayenne pepper
1/4 tsp cloves

In large heavy saucepan, bring plums, onions, water, ginger and garlic to boil over medium heat; cover, reduce heat to low and simmer. Stir occasionally until plums and onions are very tender. About 30 minutes. Press through food mill or sieve and return to clean pan. Stir in sugar, vinegar, coriander, salt, cinnamon, pepper and cloves. Bring to a boil, stirring; reduce heat to low and simmer until mixture reaches consistency of applesauce. About 45 minutes. Fill and seal jars. Process in boiling water bath for 30 minutes. Makes about 4 cups.