Place the sponge finger on a plate and sprinkle with coffee. Drain the peaches and cut into slices. Whip the cream until stiff. Mix mascarpone, yoghurt, sugar, vanilla sugar, almond liqueur and 3-5 tablespoons peach juice.
(The mixture should become creamy, but not too liquid.) Fold in the cream and refrigerate the cream. Shortly before serving, spread lady fingers on 2 plates and cover with the peach wedges.
Spread cream over it and dust with cocoa and icing sugar. Serve decorated with mint.