Strain the cherries, collecting the juice, fill up to 1/4 L with water if there is less juice. Remove some juice to mix with the red grits powder. Heat the juice with 1 - 2 tablespoons of sugar. Stir the red grits powder with a little cherry juice until smooth, stir into the boiling juice, bring to the boil and remove from the stove. Stir in the sour cherries and let the compote cool.
In the meantime, cook the vanilla pudding powder with 1/2 L milk and 2 tablespoons sugar according to the instructions, allow to cool slightly. Then stir in 3 tablespoons of sour cream and 2 tablespoons of egg liqueur.
Pour the cooled cherries into 4 dessert glasses, then the cooled pudding. Garnish with the shaved chocolate.