To make the crust, add the biscuits to a blender and blitz until you get crumbs.
Add the melted butter and blitz again briefly.
Line the bottom of a cake tin with detachable walls ( 23 cm / 9 inches in diameter) with non-stick paper, and transfer the biscuit mixture into it.
Use a spoon to press the mixture down really well to create an even layer.
Refrigerate it until the filling is ready.
To make the filling, pour the double cream into a large mixing bowl, and use a hand mixer to beat it until it holds stiff peaks.
Add the cream cheese and beat again to incorporate.
Sift in the icing sugar and beat again.
Add the freeze-dried raspberry pieces to a blender and blitz into a powder.
Sift the raspberry powder into the bowl, and add the melted chocolate.
Beat well to get a smooth texture.
Top the biscuit base with the cream cheese filling, and refrigerate for at least 2 hours, ideally overnight.
To remove the cheesecake from the tin, place the tin on top of a can, and pull the sides of the tin down.
Slide the cheesecake onto a serving plate and remove the non-stick paper.
Enjoy!