Kvass

Kvas  is a traditional beverage, quite refreshing in summer time, so-called Russian Coca-Cola. It is known as a slightly fermented rye bread drink. It contains less than 1 % of alcohol, so even children are allowed to drink it. Once tasted this soft drink in Russia during the Moscow tour with Moscow tour guide, you want to make it in your home country. Please follow the directions of the recipe.
2 1/2 quarts

Ingredients
•    Stale dark rye bread, cubed -- 1 pound
•    Water -- 3 quarts
•    Active dry yeast -- 1 (1/2-ounce) packet, or 2 1/2 teaspoons
•    Water, lukewarm (43° C/110°F) -- 1/4 cup
•    Sugar -- 1 cup or less if you want it more sour
•    Raisins -- 2 tablespoons
Method
1.    Preheat oven to 90C/200°F. Spread the cubes of bread on a baking sheet and place in the oven for about an hour, or until the bread is fairly well dried out.
2.    Bring the 3 quarts of water to a boil in a large pot. Remove from heat and immediately stir in the bread. Cover with a clean towel and let rest in a dark, cool place for 8 to 10 hours.
3.    Pour the liquid through a fine-meshed sieve or strainer, gently pressing one the bread to get the liquid out. Don't press too hard, or your kvas will turn cloudy.
4.    Mix the yeast with the warm water and a pinch of the sugar. Set the yeast mixture aside for 10 minutes to proof until foamy. Stir into the strained liquid along with the 1 cup of sugar until the sugar is fully dissolved. Cover again with the towel and let set another 8 to 10 hours.
5.    Strain the liquid again through a fine-meshed sieve or strainer and pour into a 1-gallon pitcher or container. Add the raisins and cover tightly with plastic wrap and a rubber band. Set in a dark, cool place for 2 -3 days until the yeast sediment has settled to the bottom of the container and a clear liquid remains.
6.    Carefully pour off the clear liquid into a clean container or individual bottles, taking care not to disturb the yeast sediment. Chill well before serving!

Kvas can be found in numerous grocery stores. The high-quality brands include Ochakovo and Nikola. It might also be an interesting experience to try barrel kvas which could be found in Sergiev Posad during your Moscow in three day tour.