Spicy Plum Sauce

Ingredients
4 pounds fresh plums, pitted and quartered
1 small onion, quartered
1 garlic clove, peeled
3-1/2 cups sugar
2 cups cider vinegar
1 tablespoon ground ginger
1 tablespoon ground mustard
1 teaspoon ground cinnamon
1 teaspoon crushed red pepper flakes
1/2 teaspoon ground cloves
Directions
In a blender or food processor, process the plums, onion and garlic in batches until smooth. Transfer to a Dutch oven. Stir in the remaining ingredients. Bring to a boil. Reduce heat; simmer for 60-90 minutes or until reduced by a third.
Carefully ladle hot mixture into hot half-pint jars, leaving 1/4-in. headspace. Remove air bubbles, wipe rims and adjust lids. Process for 15 minutes in a boiling-water canner. Yield: 9 half-pints.
Note: The processing time listed is for altitudes of 1,000 feet or less. Add 1 minute to the processing time for each 1,000 feet of additional altitude.