Czech Sauerkraut Soup - cooking recipe

Ingredients

1 (15 ounce) can sauerkraut (drained)
5 -6 medium potatoes (cut it into small pieces)
1/2 onion (chopped)
1 teaspoon caraway seed
salt
pepper
2 tablespoons sour cream
1/2 Polish kielbasa (cut into small pieces)
1 tablespoon vinegar

Preparation

Put the onions into the saucepan with the little bit of oil and cook over low heat until lightly yellowed do not brown.
Add water and potatoes with salt and caraway seed. Let it cook for few minutes then add sauerkraut and polish kielbasa.
Let it cook for at least 20 minutes or until potatoes are soft. Then add some sour cream, pepper and vinegar if needed.