Mix flour, milk, wine, eggs and grated coconut until smooth. Let rest for 30 minutes. Drain the pineapple. Heat oil in a pot. Pull pineapple rings through the dough and fry in portions in hot oil (160 °C).
Pour milk into a mixing bowl. Add sauce powder and whisk vigorously for 1 minute with the whisk of the hand mixer. Stir in rum. Arrange pineapple fritters with the vanilla sauce on plates. Sprinkle with grated coconut and decorate with lemon balm