This is what I do with all the odd potatoes that get damaged when digging them upor a little soft or just for any reason, its a way of storing them in the freezer and very economical too...
Boil a big pan of potatoes...
Mash with a fork, not too smooth!
Add two beaten eggs, a couple of big handfulls of oats, a large grated onion, grated cheese to your taste, a sprinkling of herbs, good ones I've tried are thyme or sage, or for a nice spicy flavour try Cumin...
mix well.
with hands, form a burger shape, roll in seasoned flour with seseme seeds in, and put on tray to open freeze... pack into bags when frozen hard, shallow fry from frozen.
Yummy.