What is the name of this traditional Slavic and Baltic fermented beverage that is used for a flavor in Fruktime and commonly made from rye bread whose colour contributes to the resulting colour of the drink?
Kvass Kvass is a traditional Slavic and Baltic fermented beverage commonly made from rye bread, known in many Eastern European countries and especially in Russia as black bread. The colour of the bread used contributes to the colour of the resulting drink. It is classified as a non-alcoholic drink by Russian standards, as the alcohol content from fermentation is typically low (0.5–1.0%). It may be flavoured with fruits such as strawberries and raisins, or with herbs such as mint.
Kyselo Kyselo (or krkonošské kyselo) (German: "kübelsauer" , Czech: "kyselo" ) is a soup based on sourdough and mushrooms. It is a traditional Czech cuisine from poor folk food originating in the Northern Bohemia mountain region Krkonoše. It is very substantial and it contains an abundance of quality proteins, B vitamins, dietary fiber and other important nutrients. Usage of sourdough is closely related to fermented flour usage in the Polish sour rye soup.