Wash the potatoes thoroughly and boil for about 25 minutes. In the meantime drain the apricots. Melt 10 g fat. Rinse potatoes cold and peel. Press potatoes while still hot through a potato press or mash them finely.
Add flour, egg yolk, 1 teaspoon of salt and liquid fat. Knead to a smooth dough with the dough hooks of the hand mixer. Form into a roll on a floured work surface and allow to cool.
Cut into about 20 slices. Take one slice in the floured palm of each hand and press a depression in the middle. Put two apricot halves filled with a piece of sugar cube into each slice. Cover the apricots with the dough and form them into a dumpling.
Cook the dumplings in portions in plenty of boiling salted water for 8-10 minutes. Heat the remaining fat, roast breadcrumbs, sugar and cinnamon in it until golden brown. Drain dumplings well and roll them in cinnamon breadcrumbs.
Dust with icing sugar. Serve with vanilla sauce.