Before starting, make sure your ingredients are at room temperature.
Preheat the oven to 230°C/446°F (without fan) (see Kitchen Notes for air fryer instructions).
Place a metal baking tray in the middle shelf of the oven.
Measure the cream cheese, sugar, cornflour and salt into a small mixing bowl.
Whisk the ingredients until everything is well combined.
Add the egg and whisk until well incorporated.
Finally, whisk in the cream and vanilla.
Line a 12 cm/5 inch cake pan with baking paper. See Kitchen Notes.
Pour the cheesecake mixture into the lined cake pan.
Tap the cake pan on the kitchen bench a few times to level the mixture and to get rid of any air bubbles.
Bake the cheesecake for 20-25 minutes, or until the top is a nice, golden brown colour but the centre of the cake should still have a slight wobble. During baking, the cheesecake will rise like a soufflé. Be careful that the cheesecake does not actually burn because then it will taste very bitter.
Leave the cake to cool in the pan for about 1 hour, before chilling in the fridge for at least 3-4 hours, or overnight. The cheesecake will sink as it cools.