Kvass or kvas (literally “leaven”; borrowed in the 16th century from Russian квас (kvas)), sometimes translated into English as bread drink, is a fermented mildly alcoholic beverage made from black or rye bread. It is popular in Russia, Belarus, Ukraine, Lithuania, Poland, Latvia and other Eastern and Central European countries as well as in all ex-Soviet states, like Uzbekistan, where one can see many kvass vendors in the streets. Its origins go back 5,000 years to the beginnings of beer production.
The alcohol content is so low (0.05-1.44%) …