Where I live they grow lots of potatoes and one year I "gleaned" spuds. I had about 100 pounds so I cooked them, sliced them and put them in my dehydrator and still have 3 gallon jars of them. They are still good! I sliced them but I think I could put them in a blender after drying and make them into instant mashed spuds. I had thought about canning them but haven't done that since the other works so well. I have frozen them after cooking and they need to be heated a lot to take the grainyness out of them.
Lynda