With potatoes looking like the wrinkly knees of an elephant, I had to try something. Potato flour was the decision to try.
I washed them, cut them into chunks, boiled them and slipped off the skins as best I could afterwards.Crumbling the results onto a dehydrator rack I set it to high and let it dry.
I then put them into the blender and came out with hard little shard like pieces. Not sure whether to put them into a wheat grinder or not. I may, they are dry. Wheat grinders hating oily seeds.