Peel the peaches, quarter them and place in a tall container, add the raspberries, currants, half of the milk and the natural yoghurt and carefully chop with the hand blender. As soon as the ingredients have mixed into a pulp, add the remaining milk and puree thoroughly. Sprinkle some cinnamon sugar over the top to taste, stir in and divide into four glasses. Garnish with a small sprig of fresh mint and serve.
Also tastes good with many other fruits. Just try it out.