@thor Not sure why winter is a problem. You didn't grow those potatoes yourself, did you? 😂
It's sold in packs at stores just like rice, buckwheat and other grains, maybe not in every store, but I'm sure you can find it if you look for it.
It might be a tiny bit more expensive than buckwheat, but it's way more nutritious IMO, a kilogram should be enough for almost a week.