Take out the pits from the sour cherries and spread sugar over them. Let them rest over night or at least for a few good hours - the fruits will leave a delicious syrup that you can enjoy with mineral water and ice cubes - the perfect homemade summer juice!
Put the fruits in cold water, and add the cinnamon, cloves, vanilla and salt. Bring to boil and cook them for about 8-10 minutes. Let it cool down aside.
In a cup mix the egg yolks with the icing sugar until it becomes a nice yellow paste. Pour the cream and stir until homogenous.
Once the soup is cold, add the cream-egg mixture and stir. It is now ready to serve.