For the semolina pudding, boil the milk in a saucepan. Remove from the heat, stir in the semolina pudding powder with a whisk and continue stirring vigorously for about 1 minute.
Rinse dessert bowls with cold water. Pour semolina pudding into four dessert tins and chill for about 3 hours. In the meantime wash, peel and quarter the apples and remove the cores. Cut the apple quarters into slices.
Wash the lemon thoroughly, peel the peel with a peeler. Halve the lemon and squeeze the juice. Stir 4 tablespoons of lilac berry juice and sauce powder until smooth. Boil up the rest of the lilac berry juice, 400 ml water, lemon juice, lemon peel and sugar.
Stir in sauce powder, bring to the boil again, add apple pieces and simmer for 1-2 minutes. Turn out semolina pudding from the moulds. Serve with the soup in four deep plates. Serve decorated with mint leaves as desired.