Peel and quarter the pineapple and remove the hard stalk, then cut into small pieces. Wash the lemon with hot water and finely grate the peel, then squeeze the lemon. Wash the mint and pluck it from the stalks, then roughly chop.
Mix the rum with sugar, lemon juice and lemon zest, pour over the pineapple pieces and let it steep for about 30 minutes.
Roughly chop the confectionery balls. Whip the cream until stiff and carefully fold in the confectionery. Serve the confectionery cream with the pineapple and garnish with the mint.