Step 1

Place all of the ingredients in a medium saucepan and bring to a boil over medium heat.

Step 2

Reduce heat and simmer for 25 minutes or until the plums are soft and the sauce has thickened slightly.

Step 3

Remove from heat and pour the sauce into a food processor or blender. Puree until smooth and return to pot. (Alternately, you can use an immersion blender right in the pot. Be careful blending hot liquids!).

Step 4

Bring the plum sauce back to a boil, then ladle into hot, sterilized jars, leaving 1/4 inch headspace.

Step 5

Place sterilized lids and rings on the jars and process for 15 minutes in a boiling water bath.

Step 6

Remove jars to a towel to rest for 24 hours. Check seals before storing.