Beat the butter (can be a little runny, I put it in the microwave for a short while at defrosting) with the icing sugar and eggs with a whisk, then stir in the quark and some lemon zest. Gradually add the flour and stir in with the dough hook. If the dough is too firm, add a little milk, up to 100 ml - the dough should be soft but not flowing. Line the drip pan with parchment paper and spread the batter evenly on it.
Peel and core the apples and cut into 1 cm wide slices. Press the apple wedges deep into the dough, close together, but so that the curves of the wedges still peek out. Bake at 170 ° C for 40-50 minutes (stick test).
In the meantime, toast the almond flakes in a pan without fat until golden brown.
Let the cake cool down a little while heating the apricot jam, puree and mix with 2 tablespoons of lemon juice. Brush onto the lukewarm cake and finally sprinkle the almond flakes on top.