Ingredients:
450g sauerkraut
400g fresh white cabbage, shredded
3 medium onions
120ml oil (or 115g butter)
2 tsp freshly-ground black pepper (or to taste)
1 bouillon cube
Method:
Drain the sauerkraut (reserve the juice) then chop up the greens and set aside. Heat the oil (or butter) in a large pan and when hot use to fry the onions for about 8 minutes, or until golden. Add the chopped sauerkraut greens, cabbage, bouillon cube (crumbled) and mix to combine. Pour the reserved sauerkraut juice over the top then cook over low heat, uncovered, stirring frequently, until the liquid evaporates.
Add the pepper, sir through to combine then take off the heat and set aside to cool. Transfer to a food processor and pulse once or twice to chop. Store in the refrigerator until needed and use to stuff your vareniki. This stuffing also works well for Pyrizhky and crepes.