01 - Preheat the oven to 320°F (160°C). Line the base of a 9-inch (23 cm) springform pan with parchment paper.
02 - In a mixing bowl, combine crushed digestive biscuits or graham crackers with melted butter until evenly moistened. Press firmly into the base of the prepared pan, then chill in the refrigerator while preparing the filling.
03 - Using an electric mixer, beat cream cheese until smooth and creamy. Add granulated sugar and blend until well incorporated. Mix in eggs one at a time, beating just until combined after each addition. Fold in sour cream and vanilla extract, followed by the passion fruit pulp.
04 - Pour the cream cheese mixture over the chilled biscuit base and smooth the top. Bake for 45–50 minutes until the center is just set with a gentle wobble.
05 - Turn off the oven and leave the cheesecake inside with the door slightly ajar for 1 hour to prevent cracking.
06 - Cool cheesecake to room temperature, cover, and refrigerate for at least 4 hours or overnight for optimal texture.
07 - In a small saucepan, combine passion fruit pulp, water, and granulated sugar. Dissolve cornstarch in a little cold water, then whisk into the saucepan. Bring to a boil, stirring until the glaze thickens and becomes glossy. Allow to cool slightly.
08 - Spoon the cooled glaze over the chilled cheesecake, spreading evenly. Refrigerate for 20 minutes to set before slicing and serving.