half a lemon, peel only, grated
145²µ/5¼´Ç³ú plain flour
30g/1oz plain flour
220g/ 7½oz caster sugar
1 cinnamon stick
pinch of salt
¼ tsp vanilla extract
100g/3½oz unsalted butter, softened
6 free-range egg yolks
300ml/10fl oz full-fat milk