For the compote, drain the peaches and collect the juice. Dice the peaches in half. Mix 300 ml of the orange juice with the vanilla sauce powder and fold in the diced peaches.
For the cream, mix the mascarpone, quark and yoghurt with the remaining 200 ml orange juice along with the powdered sugar and vanilla sugar.
Cut the biscuits up to 3 quarters and sprinkle them with a mixture of 2 tablespoons lemon juice and 4 tablespoons peach juice.
Layer the biscuits and compote alternately with the cream in a bowl, starting and ending with a layer of cream.
Chill the whole thing for 1/2 hour. Then serve the cream garnished with the 3 remaining biscuits cut in half and peach wedges.