The berries are washed, bust, put in a colander. In a saucepan pour water, boil, steam over the berries hold for 2-3 minutes. Then the berries knead a wooden mortar, retaining the juice in a separate container and add a squeeze in a pan of boiling water and boil. Add sugar, squeezed berry juice, let stand for about an hour, then cool. You can choose to cook juice with spices: cinnamon sticks, cloves and anise stars, and instead of sugar use honey.