Defrost the raspberries. Place the springform pan rim or cake ring (26 cm Ø) on a cake plate lightly coated with oil. Melt butter. Crumble the biscuits and mix with the butter. Spread on the cake plate and press on. Put them in a cold place
Soak 3 and 9 gelatine leaves separately in cold water. Drain the peaches and collect the juice. Puree the peaches and 4 tbsp. juice. Squeeze 3 sheets of gelatine and dissolve over a mild heat. Stir in the puree
Mix yoghurt, quark, lemon juice and sweetener. Squeeze 9 sheets of gelatine, dissolve over a mild heat. First stir in 2-3 tablespoons of yoghurt cream, then stir into the remaining cream
Whip the cream until stiff. Fold into the yoghurt cream. Fold in raspberries. Spread half the cream, peach puree and the rest of the cream on the biscuit base one after the other. Pull through with a fork. Chill for at least 4 hours.