Pour flour on the work surface, make a depression in the middle, add 1 egg, 75 g sugar, 1 packet of vanilla sugar, salt and fat in flakes on the edge of the flour. Knead with your hands to a smooth dough.
Put the short pastry in a cool place for about 30 minutes. Beat the remaining eggs, sugar and vanilla sugar with the whisk of the hand mixer until frothy. Stir in lemon juice and quark, sieve pudding powder and sauce powder onto the quark mixture and stir in.
Roll out the short pastry on a floured work surface to a circle (28 cm Ø) and place in a springform pan (28 cm Ø). Spread with plum jam. Pour curd mixture on top. Bake in a preheated oven (electric: 200°C/ gas: level 3) for about 15 minutes.
In the meantime, wash, halve and stone the plums. Cut the tips of the plum halves into about 1.5 cm. Cover the cake with plums, bake for another 50 minutes. Take the cake out of the oven and let it cool down.
Heat the jelly in a pot and spread on the plums. Sprinkle the plums with sugar crystals. Makes 12 pieces.