Bring the milk and 250 g cream to the boil with 1 pinch of salt. Add rice, sugar and vanilla sugar, bring to the boil again while stirring. Let it swell at low heat for 30-35 minutes, stirring from time to time.
Remove the rice pudding from the heat and let it cool down while stirring occasionally.
Whip 250 g cream until stiff. Fold into the cooled rice pudding. Put about half of the rice mixture into a mould. Approx. 2⁄3 Spread red fruit jelly in blobs on top. Fill in the rest of the rice pudding and grits in the same way.
Freeze covered overnight. Remove ice 20 to 30 minutes before consumption and allow to thaw.