Rye bread brew (kwas)

To make rye bread brew, cut a day old rye bread into pieces and dry in the oven until it develops a little darker color.

Place the bread into a deep pot, cover with boiling water and leave to sit for 5 hours.

Add sugar and yeast to the mixture and leave in a warm dark place for 3 hours.

Transfer into glass bottles or jars and leave in a warm place for 2-3 days.

Strain and cool.

You will need:

• Rye bread – 5 oz
• Dry yeast – contents of 1 bag – ¼ oz
• Water – 12 cups
• Sugar – to taste