Combine flour and salt in a food processor or bowl. Cut fat into chunks & add to flour mix. Pulse (or mash) until consistency is like coarse meal. Add ice water very slowly (you just need a very little) until dough just comes together. Chill in fridge for 15-30 minutes.
Roll dough out on well-floured wax paper. When dough is desired size/shape, flip the paper upside down onto pie tin and peel off wax paper. Press dough into pan and poke holes with a fork. For marble pie, bake empty shell for 10-12 minutes or until golden brown. Let cool before filling.