Polish Żurek is a soup traditionally prepared for Easter. In some Polish families White Borsch is cooked instead of Żurek, the difference is Kvas/ starter that is used. For Żurek- rye starter, for Borsch – wheat kvas.
If you plan to cook traditional Polish Sour Soup Żurek, you need a rye starter. You can buy one in Polish store or – I encourage you to- make one at home. It takes a few days for the fermentation to make it job, so few days before making Żurek, follow these instructions: How to make Kvas/Starter for Żurek.
Kvas is a basic ingredient of Żurek, traditional Polish soup, prepared for Easter. It can be also called: kvas or rye sour soup starter, and is made by fermenting rye (for Żurek) or wheat (for White Borsch) flour. The process is easy, although you need few days to have your own homemade kvas/ starter for rye sour soup.
There is a whole variety kinds of starters, that you can prepare and use for soups, it depends on the flour you use. I prefer oatmeal one, because you can get very fresh flour on the spot- all you need to do is to grind oatmeal in an old coffee mill:) If you plan to make 100% traditional Żurek, use rye flour and follow the instructions below.