Using a kitchen aid with the kneading head (or any equivalent mixer), mix your flour and butter together for a couple of minutes
Add the salt, zest and egg yolk and water while mixing and let it knead for 4-5 minutes, until a dough starts forming
Once done, remove it from the mixer and place your dough on a cling film, and flatten it a bit to get a circular shape
Cover your dough completely with cling film and refrigerate for an hour
With some butter at room temperature, use a brush to butter your tart mold
Once the dough is cold, flour your work surface and start spreading it using a pastry roll
When the size is big enough to cover the tart mold, roll your dough around your pastry roll and unroll it over your tart mold
Using your hands, gently press the dough inside the mold to give it its shape and cut all the outside excess (you can use them later on or refrigerate/freeze them)
With a fork, pick the surface at several places to avoid the dough from rising in volume
Preheat your oven at 180 degrees Celsius (356 degrees Fahrenheit) with convection on
Place a parchment paper on your dough and beans (to put pressure on the surface)
Place in the oven for 20 minutes
Remove from the oven, remove the parchment paper and beans, beat one egg and brush it over your tart crust
Place back in the oven for 5-10 mins or until golden brown
Let your tart crust cool on a cooling grid