I am married into a polish family and I served this at Christmas dinner and was told that it was just like what some had been served when they went to Poland. Also in the 10 years give or take that I have been in this family the Kielbasa was a very important part of the holiday meal every holiday. It has never been served with sauerkraut as far as I can remember. That may be personal taste on my family’s part. A special trip is made into the city for the Kielbasa the day before dinner so it is as fresh as it can be and depending on the holiday it is severed hot or cold.