Zurek or zur is a very traditional Polish soup.
A distinctive feature of this exclusive food is its sour taste. However, this is not like the sour taste of lemon. Zurek is much more delicate and extremely palatable. The taste of this Polish soup comes from sour leavening of fermented flour and bread crumbs.
In many Polish homes zurek is a traditional food eaten during Easter holidays. The dish is very nutritious and quite lavish. Oftentimes, it is served in a specially hollowed out loaf of bread. Trademark additions to the soup are hard-boiled eggs and a peculiar Polish sausage. The sausage is called white sausage by the Poles (biala kielbasa) and is boiled in water before being added. Smoked bacon or ribs are another popular extra.