Żurek is a traditional soup characterized by its distinctively sour taste, which comes from sour leavening, or the fermentation of bread and rye flour. The soup also contains meats such as sausages, bacon, or ham, and vegetables such as potatoes and mushrooms.
Although it is extremely popular throughout Poland, each region has its own version of the dish. It is sometimes served in an edible bowl made of bread, when it is common to add halves of hard-boiled eggs on top of the soup as garnish. Żurek is traditionally prepared and consumed during Easter.