1. Melt the sugar over low heat with water and liquid vanilla.
2. Let the obtained syrup cool.
3. Arm yourself with a good knife.
4. Peel the pineapple.
5. Remove the eyes and the core (although I often forget to remove the core...).
6. Slice it as thinly as possible.
7. Arrange the slices in a shallow dish.
8. If there are children or non-alcohol drinkers among your guests, reserve the pineapple slices in two separate dishes and take out a portion of the syrup.
9. For the others (including me...), add rum and a little grated ginger to the syrup.
10. Pour the syrup over the pineapple slices.
11. Let it marinate in the refrigerator for several hours.
12. Serve the carpaccio drizzled with syrup, on a plate or platter.