Combine the flour and salt, then add the cold, diced butter.
Mix the butter into the flour by hand until it is combined and becomes a sandy texture.
Add the sugar and combine and mix the egg into the dough.
Make a ball from the dough.Dust the dough ball with flour and work the dough with the palm of your hand (fraisage). Press and stretch the dough by rolling with your palm 5-6 times to obtain a homogeneous consistency.
Wrap the dough in plastic film and refrigerate for 20-30 minutes before use.
When ready to use, roll the dough out as you would do with any other crust.