Kiki's Kitchen-White Chocolate Cheesecake

I have a sweet tooth. No, make that a VERY sweet tooth. And watching TV programmes like Great British Bake Off  doesn't help at all. Every time I watch it I have to eat. And bake. Like...IMMEDIATELY.
So, here's a cheesecake. A cheesecake that doesn't need baking coincidentally. But it's still very good.

Here's what ya'll need:

butter: 75g
digestive biscuits (or similar dry biscuits): 10, crushed
white chocolate: 300g, broken into chunks
mascarpone: 500g
double cream: 150ml
strawberries, blueberries or any other fruit to decorate (apart from melon....don't use melon, I really don't like it :D)

* butter a round cake tin
* put the butter in a saucepan and melt slowly over a low heat. remove saucepan and add crushed digestive biscuits stirring until thoroughly mixed. spoon this mixture into the cake tin, compact it and place in the fridge to cool.
* put the white chocolate (and do me a favour and use GOOD white chocolate with vanilla and not a sugary mess) and about 100g of mascarpone into a bowl. place the bowl over a saucepan of simmering water and stir until chocolate melts. leave to cool slightly  and then whisk in the remaining mascarpone until smooth. stir in the cream. leave for 5 minutes or so for it to firm up a bit.
 * spoon  the mixture on top of biscuit base and smooth it over. chill in the fridge for at least 3 hours, but preferably overnight. do not be like me and check it every 5 minutes to see if it's ready to eat yet. It's not.
before serving, decorate with strawberries or other fruit. try not to eat the whole cake in one go. leave some for your boyfriend or a husband.