half a lemon, peel only, grated
145驳/5录辞锄 plain flour
30g/1oz plain flour
220g/ 7陆oz caster sugar
1 cinnamon stick
pinch of salt
录 tsp vanilla extract
100g/3陆oz unsalted butter, softened
6 free-range egg yolks
300ml/10fl oz full-fat milk