For the quiche dough, cut 120 g of butter into flakes (the put it in the freezer for about 20 minutes and grate it coarsely on the raw food grater).
Mix the flour with about 1/2 tsp salt. Add the butter and grate everything between your hands to fine crumbs.
Add 1 egg, 2-4 tablespoons of water and knead everything into a smooth dough.
Form the quiche dough into a ball, wrap it in plastic wrap and let it rest in the refrigerator for about 30 minutes.