01 - Preheat oven to 320°F (160°C). Line the base of a 9-inch springform pan with parchment paper.
02 - Combine crushed biscuits or graham crackers with melted butter in a bowl until the mixture resembles wet sand. Press firmly into the base of the prepared pan to form an even layer. Refrigerate while making the filling.
03 - Using an electric mixer, beat cream cheese until completely smooth. Add sugar and mix until combined. Incorporate eggs one at a time, mixing gently until just blended. Mix in sour cream and vanilla extract, then gently fold in passion fruit pulp.
04 - Pour the cream cheese filling over the chilled base. Smooth the top to create an even surface. Bake for 45 to 50 minutes or until set with a slight wobble in the center.
05 - Turn off the oven and leave the cheesecake inside with the door ajar for 1 hour to cool slowly. Remove and cool to room temperature before covering. Refrigerate for at least 4 hours or overnight.
06 - In a small saucepan, combine passion fruit pulp, water, and sugar. Dissolve cornstarch in a little cold water and whisk into the saucepan. Bring to a boil over medium heat, stirring constantly until thickened and glossy. Allow to cool slightly.
07 - Spoon the glaze evenly over the chilled cheesecake. Chill for at least 20 minutes to set the topping before slicing and serving.