Preheat the oven to 190°C
Yeast dough
Mix the yeast with the lukewarm milk and half of the flour to a soft dough. Let the dough rest for half an hour. When the dough has risen nicely, add the remaining ingredients and knead vigorously. Cover the dough and let rest for 30 minutes.
Quark mixture
While the yeast dough is resting: Liquefy butter and mix with curd, sugar, flour, vanilla pudding powder, milk and the egg until it is smooth. Don't forget a pinch of salt and a squeeze of lemon juice!
Roll out the yeast dough evenly and place in a greased springform. Press the dough around the edge and prick the bottom a few times with a fork. Spread the quark mixture on the dough and smoothen it down. Depending on your taste, sprinkle a handful of raisins on top (not a must).
Schecken mixture
Bring 275 ml milk with 85 g sugar to boil. Mix the rest of the milk with the pudding powder and add to the sweetened milk, boiling once while stirring, then remove the heat.
Separate the eggs clearly. Gradually add the butter and egg yolks to the hot pudding and beat well. Whip the egg whites with the remaining sugar until stiff. Beat in the sugar in batches. Add a pinch of salt. Once the beaten egg whites are stiff, gently fold them into the pudding immediately. Pour the entire Schecken mixture onto the quark and smooth it out.
Now bake the Eierschecke at 190°C for 20 minutes, then reduce the temperature and bake at 160° C for another 20 minutes. (Total baking time at least 40 minutes, test with chopsticks recommended).
Ready? Let the Eierschecke cool down, sprinkle with a little sugar and enjoy!