In a circular shallow baking tin, add the butter and air fry at 140°C for 2 minutes to melt.
In a food processor (or in a sandwich bag, using a rolling pin), break up the biscuits into crumbs. Stir into the melted butter and press down evenly into the tin.
In a large bowl, mix the cream cheese, sugar and vanilla extract.
Add one egg at a time, mixing well after
each addition.
Pour the mixture over the biscuit base and air fry at 140°C for 30 minutes.
Leave to cool completely, before carefully removing from the tin. If you don’t have a loose-bottomed tin (like we don’t), slide a small knife around the edges to loosen. Place a plate on top, flip the tin over, then place another plate on top to turn it back the right way up.