Prepare the Crust: In a mixing bowl, combine the graham cracker crumbs and melted butter. Mix until the crumbs are evenly coated, then press the mixture firmly into the bottom of a springform pan to create a crust. Allow it to cool in the refrigerator for about 20 minutes.
Make the Cheesecake Filling: In a separate bowl, beat the softened cream cheese and granulated sugar until smooth. Add in the pineapple puree and mix until fully incorporated.
Whip the Cream: In another bowl, beat the heavy cream until stiff peaks form. Carefully fold this whipped cream into the cream cheese and pineapple mixture until well combined.
Add Gelatin: Stir the dissolved gelatin into the cheesecake mixture until there are no lumps and everything is well mixed.
Combine and Chill: Pour this cheesecake mixture over the cooled crust. Smooth the top with a spatula and refrigerate for at least 4 hours, or until fully set.
Garnish and Serve: Before serving, garnish with fresh pineapple slices to make it a true showstopper!