200g/7oz blueberries
1 orange, zest only
170g/6oz condensed milk
100驳/3陆辞锄 plain flour, sifted
125驳/4陆辞锄 caster sugar
2 tsp whole fennel seeds
3 tbsp icing sugar, sifted (optional)
1 tbsp vanilla bean paste
50驳/1戮辞锄 chocolate digestives
100驳/3陆辞锄 unsalted butter, melted and cooled, plus extra for greasing
600ml/20fl oz double cream
4 medium free-range eggs