200g/7oz blackberries
1 lemon, zest only
1 orange, zest only
50驳/1戮辞锄 plain flour
50驳/1戮辞锄 caster sugar
2 tbsp runny honey
2 tbsp icing sugar
2 tbsp toasted pine nuts
陆 tsp vanilla extract
30g/1oz unsalted butter
3 free-range eggs, separated
250g/9oz ricotta cheese, strained
2 tbsp Greek yoghurt