Wash the plums, carve crosswise at the top and bottom, cut lengthwise and remove the stones. For the dough mix quark, milk, oil, 75 g sugar and vanillin sugar. Mix flour and baking powder and knead into the dough.
Grease the grease pan of the oven and roll out the dough on it. Separate the eggs. Mix all egg yolks, sour cream, 100 g sugar and 100 g grated coconut. Spread the coconut sour cream on the dough. Cover with the plums diagonally.
Bake in the preheated oven (electric oven: 200 °C/ gas: level 3) for 25-30 minutes. Beat the egg white until stiff and gradually add the remaining sugar. Fold in the remaining grated coconut and fill the mixture into a piping bag with a perforated nozzle.
In the opposite diagonal, spray tuffs in rows between the plums. Bake again for about 10 minutes until the macaroon mass begins to brown. Results in about 25 pieces.