Slice butter and place back in refrigerator until ready to use.
Combine flour and salt in food processor bowl.
Pulse 2 or 3 times to insure it is mixed.
Add butter, a couple of slices at a time, pulsing after each.
Pulse until mixture is crumbly.
Add water, one tablespoon at a time, pulsing after each, just until dough holds together.
Turn out onto a piece of plastic wrap.
Flatten into a disc and wrap.
Refrigerate for 15 minutes.
Unwrap and place on a piece of parchment paper sprinkled with flour.
Sprinkle top of dough with flour.
Roll out into a large circle, ⅛-inch thick.
Fit dough into pie plate.
Trim.