Mash boiled potatoes, add sauerkraut juice and cabbage itself. If you don’t have juice, it doesn’t matter, just add more cabbage – you won’t regret it. At this stage, add 2 tablespoons of semolina to the potato dough (or 3 if the puree is too thin). At this moment, grains of semolina are visible in the potatoes, but don’t worry – the cereal will gain moisture from the potatoes in a few minutes, swell and become a connecting link (instead of eggs).