Bring milk to the boil in a pot. Stir in sugar, vanilla sugar, salt and rice. Bring to the boil while stirring several times and simmer at low heat for about 25 minutes.
Then stir in sour cream and lemon juice. Fill rice pudding into 4 bowls, spread some groats on top. Add the rest of the groats separately. Serve decorated with raspberries, blueberries, currant panicles and mint leaves.