Sweet pie dough

This is a recipe for pie dough. The recipe is originally French, but the Italians do use a similar recipe for doing a pie called "crostata".

Ingredients

250gr flour
125gr butter
75gr sugar
1 pinch of salt
1 egg

Instructions

Mix flour, sugar, salt and butter together until you get a sandy mixture. Add the egg and mix until you get a dough. Put it in a plastic bag for food and distribute the dough so it gets thin. It will cool down quicker.
After half an hour, take out the dough from the frigde and mix it again with your hands to get an elastic consistence. At this point you can use for your pies.

Note! I have had the less smart idea to make it a little sweeter by adding some additional sugar. Bad idea. The pie gets more crunchy and the taste is less enjoyable.