4 pieces stem ginger (from a jar), finely chopped
1 tsp vanilla extract
25g/1oz plain chocolate
150²µ/5½´Ç³ú plain chocolate, grated or made into curls
150²µ/5½´Ç³ú digestive biscuits, crushed
300²µ/10½´Ç³ú white chocolate buttons, or a bar chopped into pieces
50²µ/1¾´Ç³ú butter, plus extra for greasing
400g/14oz full-fat cream cheese
2 free-range eggs
150ml/5fl oz soured cream