Ingredients:
3 slices of bacon, diced
1 large onion, chopped
500g sauerkraut, drained (rinse and squeeze thoroughly dry)
1½ tbsp tomato purée
2 tsp sugar
80ml chicken stock
Method:
Fry the bacon in a large frying pan or skillet over medium heat until it renders its fat. At this point remove the bacon with a slotted spoon and reserve. Drain all but 2 tbsp of the fat from the pan then add the onion and fry over medium heat until golden brown (about 12 minutes).
Turn the heat up to medium high then add the sauerkraut and continue cooking, stirring frequently, until the sauerkraut is soft and has warmed through (about 10 minutes). Now stir in all the remaining ingredients, reduce the heat to low and simmer gently for about 20 minutes. Take off the heat and allow to cool to room temperature before using the mixture as a filling for your vareniki (use the bacon as a garnish for the finished dish).