Knead the butter with the curd, salt, eggs and enough flour to make a soft dough. Shape the dough into a loaf and let it rest in a sealed container for about half an hour.
Rinse and pat the apricots, remove the seeds and put 1 sugar cube in each apricot.
Boil water with salt.
Roll out the curd dough on a floured board to about 1 cm thick and cut out 5 cm squares. Wrap each apricot in a piece of dough and press the dough together.
Place the dumplings in the lightly boiling salted water and cook for 8 to 10 minutes.
In the meantime, toast the breadcrumbs with the sugar in the butter until golden brown and sprinkle over the apricot dumplings with curd dough.