Beat the yolks with sugar.
Add flour, baking powder, cocoa powder, milk and oil.
Carefully add the yolks.
Spread the mixture in a buttered, floured pan.
Prepare the curd dots.
Combine curd, sugar, semolina, egg, lemon zest and vanilla sugar.
Dot with cocoa dollop and bake on 360 degrees for 30-35 minutes.