Stir 3 tablespoons of apple juice and cornflour until smooth. Boil up the rest of the apple juice and white wine with the aniseed star, sugar, cinnamon stick, lemon juice and amaretto. Add cornstarch while stirring and bring to the boil again.
Wash the apples and cut out the cores. Cut the apples into wafer-thin slices and cook them in the soup at low heat for about 5 minutes. Season to taste again. Serve hot or cold as you like, decorated with amaretti and mint.