To make the pastry, combine the butter, icing sugar, flour and lemon zest in the bowl of a food processor.
Pulse until the mixture resembles rough bread crumbs.
Add the egg yolks and with the blender running, pour in the water, spoon by spoon until the mixture comes together in a ball.
Turn the mixture out onto a floured surface and shape into 2 discs. Wrap in plastic wrap and place in the fridge for 15 minutes.
Pre-heat the oven to 180°c. Roll the chilled pastry out on a floured surface and press into 2x 28cm tart cases.
Blind bake the pastry for 10 minutes then remove the baking paper and baking beans and return the pastry back to the oven for another 10 minutes to finish baking.
Remove and set aside while you make the filling. Turn the oven down to 100°c.
For the filling, heat the cream and sugar in a saucepan until small bubbles appear around the edge of the pan, do not allow to boil.
In a separate bowl, whisk the eggs.
When the cream is hot, slowly pour into the eggs, whilst continuously whisking.
Pour in the lemon juice and lemon zest and mix well.
Strain the mixture into a jug and carefully pour into the baked tart cases.
Bake the tart for 50 minutes until the edges are set and the centre is still slightly jiggly.
Remove from the oven and allow to cool to room temperature before placing in the fridge to cool completely.
When you are ready to serve, slice the tart and serve with a dusting of icing sugar.
Blind baking: Line the pastry with a round of baking paper and add baking beans, dried beans or rice.
This recipe makes 2x28cm tarts. If you don't want to make two, simply freeze the remaining pastry and filling for another time. Alternatively, you could use the remaining filling to make little lemon pots. Just pour the filling into oven-proof ramekins and bake with the tart until the pots are a little jiggly in the middle, then cool and eat.
The ultimate Lemon Tart https://simply-delicious-food.com/the-ultimate-lemon-tart/