Slice your passionfruits in half and strain through a sieve to extract as much juice as possible. Set aside.
If serving in passionfruit shells, remove the thin layer of flesh to reveal a smooth surface for serving.
In a small pan over medium heat, combine sugar and coconut cream and whisk continuously, just until the sugar has fully dissolved (about 1-2 minutes).
Add the passionfruit juice to the mixture and transfer to the blender. Add silken tofu and lime juice and blend until completely smooth.
Transfer the mixture to your passionfruit shells or a serving vessel of your choice (for something more practical, a short drinking glass or small ramekin works). Chill in the fridge for 3 hours or overnight, until fully set.
To serve, sprinkle with additional cane sugar and torch until it starts to bubble and turn golden brown, or serve as is. You can also top with more fresh passionfruit pulp (seeds included) and some fresh lime zest.