Bring 1/2 l milk, 3 tablespoons sugar, vanillin sugar and salt to the boil. Add semolina and simmer for about 5 minutes, stirring frequently. Stir in egg yolk. Let cool down for about 1 hour
Drain the mandarins. Beat 1/4 l milk and sauce powder in a high mixing bowl with the whisk of the hand mixer for approx. 1 minute. Fold in the mandarins
Form 8-12 longish dumplings from the semolina mixture with 2 moistened tablespoons. Heat butter in a frying pan. Fry the dumplings in it until golden brown all around
Mix 1-2 tablespoons sugar and cinnamon. Remove the dumplings and turn them into cinnamon-sugar. Serve with the sauce