Despite its name, buckwheat is not actually wheat at all, but a relative of rhubarb and sorrel. It contains no gluten, so it's an excellent storecupboard staple for people on gluten-free diets. Buckwheat grows well in cool climates, and has long been a staple in countries such as Japan, Russia, Poland, and beyond. Try French Galettes Bretonne, Japanese-style buckwheat noodle soup, and lots more.