Steam plenty of peeled, cubed purple-skinned kumara and boil a cup of pearl barley until tender. Drain well and place in an ovenproof dish with a little beef stock, some sliced semi-dried tomatoes ...

Every recipe for potato rosti that I have come across simply says to grate par-boiled potatoes ... The same is sort of true for kumara rosti. Kumara have both starch and sugars present, but ...