The BEST cheesecake ever

Ingredients
1 packet (250g) digestive biscuits
100g butter
2 x 250g cartons cream cheese
1 x 250g carton sour cream
1 cup sugar
1tsp vanilla
2 large or 3 medium eggs
berries, icing sugar or passionfruit topping to serve

Method
Heat the oven to 160deg with the rack a little below the middle
CRumb the biscuits using a food processor or put them in a plastic bag and crush them with a rolling pin.
Melt the butter until it is just liquid and stir in the biscuit crumbs
Press the mixture over the bottom and up the sides of a 20 or 23cm loose-bottomed, round cake pan using the back of the spoon.
beat the cream cheese, sour cream and sugar until soft and fluffy, using a food processor or beater. Beat in the vanilla then the eggs one at a time.
Pour the mixture carefully into the biscuit lined pan.
Bake for 40-50min until the centre is firm, without letting the top brown
( cover the top of the pan with a peice of baking paper if it looks as if it is starting to brown).