Subscribe to BBC History Magazine
Get access to Ruth Goodman's Academy course + your choice of hardback and signed book
Preheat oven to 170°C/gas mark 3. Add salt, lemon zest and butter to the flour and mix between fingertips until it resembles breadcrumbs.
Add sugar, then the beaten egg and extra yolk, and form into a ball. Wrap in clingfilm, chill in a fridge for 1-2 hours, then roll out on a floured surface to 2mm thick.
Use the pastry to line an 18cm flan ring, placed on a baking tray, and cover with greaseproof paper and baking beans. Bake for 10 mins or until pastry starts to go golden brown. Remove, then cool. Reduce oven to 130°C/gas mark 1.
Bring the cream to the boil. In a separate bowl whisk egg yolks with sugar and mix in the cream. Fill the pastry case to the brim and grate nutmeg on top. Bake for 30–40 mins or until set. Allow to cool.