My Mum's Shortcrust Pastry

My mum is a brilliant pastry chefette and this is her recipe, it is melt in your mouth pastry, amazing!

1. 1

   Rub fats and flour together until it resembles breadcrumbs in a food processor or mixer or by hand.
   
   Then add sugar, mix with beaten egg and enough water to form a dough.
   
   Use cornflour for rolling out as this is lighter than flour.
   
   Make whatever pies you like with it, brush tops with egg and sprinkle with some more sugar, then bake.