Kvas Monastyrskiy is a traditional non-alcoholic fermented beverage that is popular in Russia and other Eastern European countries. It is made from a mixture of rye flour, water, and sugar, and is fermented using a special culture of yeast and bacteria.
The fermentation process gives Kvas Monastyrskiy its unique flavor, which is described as slightly sweet and slightly sour, with a hint of bread or malt. It is often enjoyed as a refreshing beverage on its own, or used as an ingredient in various recipes, including soups and stews.