Mix salt and flour together. Freeze for a few minutes.
Cut butter into small pieces. Freeze for a few minutes, as butter softens immediately upon cutting. If using food processor, put flour mixture in bowl.
Lay small pieces of butter evenly over flour and mix for 20 seconds at a time, stopping as soon as dough is shaggy.
Stream in cold water one tablespoon at a time. ( If using kitchen aid type mixer, use paddle attachment on low setting for one minute max. Stream in cold water on sides of bowl. Mix on low, just until incorporated.)
Form into disc , wrap in plastic at least one hour.
Roll out and cut pastry shapes.
Put cut outs on pie.
Brush cut outs with milk.
Bake at 350 for 45-60 minutes or until golden and crisp.