15 fresh basil leaves, finely chopped
1 lemon, zest only
400g/14oz plain flour, plus extra for dusting
110g/4oz caster sugar, plus extra for dusting
1 tsp vanilla bean paste
50²µ/1ΒΎ΄Η³ϊ white chocolate, grated
250g/9oz unsalted butter, softened
4 tbsp raspberry jam