Mix milk, eggs, flour, 1 pinch of salt and 5 tablespoons of liqueur to a smooth dough. Leave to swell for about 15 minutes. In the meantime wash apples, quarter them, remove seeds and cut them into slices.
Drizzle apples with lemon juice. Whip cream, vanilla sugar and 3 tablespoons of liqueur until semi-stiff. Heat 1/2 tablespoon of oil in a pan (16 cm Ø). Put 1/4 of the apple slices in it. Pour 1/4 of the dough over them and bake for about 2 minutes until golden brown.
Turn the pancakes carefully, bake them from the other side for another 2 minutes. Keep warm. Bake 3 more pancakes from the remaining dough and apples. Fill with cream and fold over. Dust with icing sugar and serve decorated with mint.