I got a small bag of prune plums at the farmers market today, and since they were so overripe that they mushed when I tried to pit them, I came up with this to do with them:
Plum spread (and multipurpose puree of deliciousness)
10-12 fresh prunes (or apricots or pears or whatever you've got), pitted but not skinned
1 small apple or pear, cored and thinly sliced but not peeled
several shreds of fresh orange or lemon zest (optional)
1-2 Tbsp. water
Put it all in a pan over medium heat and cover until it's cooked enough to release some moisture. Then uncover and simmer, stirring occasionally (use a heat diffuser if you've got one, but I didn't) until it's mushy and thick. Throw it into a blender or food processor (or cone ricer) and puree. Add spices and/or sugar if you want, but I like it just like that.
Spread it on toast/waffles/biscuits, or stir a spoon of it into some soy yogurt (vanilla in this case):
Without added sugar this won't keep all that long in the fridge, so freeze some if you make a big batch. In fact, you could freeze this in ice cube trays, then get (or make) a big tub of plain yogurt (much cheaper than the little ones!), drop a cube of this stuff into a small tupperware, top it off with yogurt, and take it to work/school with you for a snack later.