Knead the flour, fat in flakes, icing sugar and egg yolk into a smooth dough. Wrap in foil and chill for about 30 minutes. Grease a springform pan (24 cm Ø). Roll out dough between 2 layers of foil in springform pan size. Line the base with it. In the meantime knead marzipan, egg and 70 g sugar to a smooth mixture.
Fill into a piping bag with star-shaped spout. Spray the macaroon rosettes close together on the edge of the shortcrust pastry base. Bake in a preheated oven (electric: 175 °C/ gas: level 2) for 15 minutes. Cover the macaroon rim with aluminium foil and bake for another 7-10 minutes. Let cool off. For the filling, wash, halve and stone the plums. Simmer with cherry and lemon juice for 3-5 minutes. Mix pudding powder, 75 ml cold water and remaining sugar. Stir into the hot plums, bring to the boil briefly. Cool slightly and fill onto the short pastry base. Leave to cool completely. Whip cream and vanilla sugar until stiff.
Mix pudding powder, 75 ml cold water and remaining sugar. Stir into the hot plums, bring to the boil briefly. Cool slightly and fill onto the short pastry base. Leave to cool completely. Whip cream and vanilla sugar until stiff. Allow the cream setting agent to trickle in. Spread on the compote. Serve decorated as you like with candied violets and rose petals, mint, browned almond flakes or plum wedges