For the dough, sieve the flour into a mixing bowl. Add butter, egg (size M), sugar, salt, work well with the dough hook first on the lowest, then on the highest setting.
Then knead into a smooth dough on a floured work surface. If it sticks, put it in a cool place wrapped in foil.
Roll out 2/3 of the dough on the bottom of a springform pan (diameter 26 cm). Knead the flour under the rest of the dough, shape it into a roll, place it on the dough base as an edge, press it against the mold so that an edge about 3 cm high is created. Prick the pastry base several times with a fork. Put the tin on the wire rack in the oven. Top / bottom heat: 200 - 220 ° C (preheated) Hot air: 180 - 200 ° C (preheated) Baking time: approx. 10 minutes
Separate the eggs for the filling. Beat egg whites until stiff. Beat the egg yolks, butter and sugar until frothy. Stir in the cornstarch.
Prepare a pudding from the pudding powder and milk according to the instructions on the package, allow to cool a little. Stir the pudding and quark into the egg yolk mixture.
Finally fold in the stiffly beaten egg white. Put the mixture on the pre-baked base and smooth out. Put the springform pan on the wire rack in the oven.
Top / bottom heat: around 180 ° C (preheated) Hot air: around 160 ° C (not preheated) Baking time: around 60 minutes