I'm still not sure such a thing is really possible, but I think I might have frozen a few too many peaches. Or maybe I just haven't been baking enough! Anyway, here's something I've been doing with a few of them, to mix things up a bit for my toddler from just plain applesauce.
I posted directions for making regular applesauce a while back. To make peach applesauce, take a bag of peaches out of the freezer and let it thaw, then drain (drink the juice if you like!). Add the peaches along with the apples to cook, then proceed as you would for standard applesauce. Since I froze my peaches with the peel on, I have been using an immersion blender on the cooked applesauce to break up the peels, since Nate has a hard time with them.