Soak gelatine in cold water. Carve apricots crosswise, blanch with boiling water and quench. Peel skin. Cut apricots in half, stone them and cut them into fine cubes.
Stir the quark, lemon juice, 2-3 tbsp. sugar and vanillin sugar until smooth. Add the apricots.
Squeeze out the gelatine and dissolve carefully. First stir in 3 tbsp. of the quark mixture, then stir into the remaining quark. Whip the cream until stiff and fold in. Pour the mousse into a flat bowl or form and cover with a cloth.
Chill for 4 hours.
Select the raspberries, rinse and drain if necessary. Puree 2/3 raspberries and 1 tsp. sugar and pass through a sieve. Use a tablespoon to cut off any cams from the mousse. Serve with raspberry sauce and the remaining raspberries.
Dust with icing sugar.