Preheat the oven to 160°C.
Melt the butter in a 28cm ovenproof frying pan over low heat.
While the butter melts, blitz the biscuits until fine in a food processor.
Turn off the heat and mix the biscuit crumbs with the melted butter in the pan until well combined. Spread and pat out the mixture in an even layer, going slightly up the sides.
Bake the biscuit base for 5 minutes, then remove from the oven.
In a large mixing bowl, beat the cream cheese and sugar together until smooth and creamy.
Add the eggs one at a time, mixing well after each addition.
Mix in the lemon curd, vanilla bean paste, and lemon juice until well combined and smooth.
Add the cream cheese and lemon juice to the processor and blitz until well combined.
Pour the cheesecake filling over the cooled crust and spread it out evenly
Mash half of the raspberries with the remaining icing sugar using a fork. Swirl the raspberry mixture through the top of the cheesecake.
Bake for 15 minutes.
Pull out the pan and scatter the remaining raspberries with a dust of icing sugar. Switch from the oven to the grill on full whack. Grill until the top is beautifully golden and just starting to catch.
Remove from the oven and let cool, then chill in the fridge for 2-4 hours before serving.