Kvas is a Russian drink that is also popular in other countries of eastern Europe. It's easy to make and very refreshing. It's similar to beer but has a very low alcohol content. Here is the recipe:
12 cups of water
2 slices of dark rye bread
1 cup of sugar
1/2 tablespoon yeast
Fill a pot with water and boil.
Toast the slices of bread until they are very dark, but do not burn.
When the water starts to boil, remove from the heat.
Add the bread and a few raisins to the pot and cover for at least 8 hours.
Carefully remove the toasted bread and discard.
In a bowl mix the sugar and the yeast and add to the pot.
Stir the yeast and sugar.
Cover the pot and leave for 6 hours.
Take out the raisins.
With a strainer pour the liquid into bottles and leave overnight.
The drink will be ready the next day. Enjoy!