1 kilogram of beet, peeled and rinsed, cut into small slices or quarters, put into a stone pot and pour lukewarm boiled water. Add 2teaspoons of sugar on top put a dry piece of bread and pressedplate. Let stand for 5-7 days. Then decanted into bottles and store in a dry and dark place.
If we acid after resolution of infection, we can use it to cook the perfect soup.