Clean, wash and chop the strawberries. Select and wash the raspberries. Set aside 3 tablespoons of raspberries. Puree the berries in a tall mixing bowl with the cutting stick of the hand mixer
Mix the fruit puree with lemon juice, sugar and vanillin sugar until the sugar is dissolved. If necessary, refine with grappa. Stir in raspberries
Divide the berry sauce between 4 dessert glasses and place 1 ice cream scoop on each. Decorate with mint if desired
If you don't have a hand blender: Strain raspberries through a sieve, mash strawberries with a fork, and mix both. Icing sugar and fine refined sugar are better suited for sweetening fruit puree because they dissolve faster than the usual coarse household sugar. Berry puree is a fine addition to many desserts, e.g. pudding, white mousse. During the season it is best to prepare a larger quantity and freeze in portions