01 -
Mix the superfine sugar with cornflour in a decent-sized heat-safe bowl. Add the egg and whisk well, then pour in the fresh lemon juice and add the lemon zest.
02 -
Set the bowl over simmering water, stir frequently, and let it cook about 8 minutes until it gets thick. Keep stirring another 2 minutes for extra thickness. Take it off the heat, drop in the butter, and mix it up to cool it down fast.
03 -
Put plastic wrap directly on the curd's surface and stick it in the fridge for at least 30 minutes. Then split it into 10 equal lumps on a lined sheet and freeze them for an hour till they're hard.
04 -
Beat the butter with superfine sugar, lemon zest, and vanilla until it's nice and fluffy. Add the egg and mix well. Then sift the flour, salt, and baking soda together and fold them in until you've got a dough that won't stick to your hands.
05 -
Pop the dough in the fridge for about 20 minutes until it's firm enough to work with.
06 -
Scoop out balls of dough, flatten each one, and stick a frozen lemon curd piece in the middle. Wrap the dough all around the filling, roll it into a nice ball, and coat it in white sugar.
07 -
Put the sugar-coated balls on a lined baking sheet about 5cm apart from each other. Bake them in your oven at 180°C (350°F) for 8-9 minutes until they're still soft in the middle but getting golden around the edges. Let them cool right on the tray.