Preheat the oven to 180℃. Cut a circle of pastry the size of your cheesecake dish. Place it between two layers of baking paper and between two baking trays. Bake for 30 minutes.
Place 2 Tbsp of water into a small glass bowl and sprinkle the gelatine powder over it. Stir to dissolve and set aside for a few minutes.
Microwave for 15 seconds.
Beat the cream cheese and sugar in a bowl for a minute. Place the cream into a separate bowl and whisk to firm peak. Fold the Biscoff and half of the whipped cream into the cream cheese mixture, then gently fold the remaining cream.
Place the baked pastry round into the base of your round cheesecake dish. Spoon the mixture on top of the pastry and refrigerate for 6 hours.