Peel the pineapples and remove the core.
Cut 10 equal cubes and cut the remaining pineapple into brunoise.
Grind the spices and heat to 70 ˚C in a dry pan.
Set aside.
Caramelise the sugar and deglaze with the rum and water.
Add the spices and the lemongrass.
Reduce to caramel and pass through a fine sieve.
Add the caramel to both types of cut pineapple and vacuum seal.
Marinate in the refrigerator for 6 hours.