This is very easy and delicious soup. Each family in Czech Republic makes it a little bit different this is the way we do it.
- 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.