1. Whisk together the flour, sugar and salt in a mixing bowl.
2. Add the shortening to the bowl and mix lightly with your hands to coat all the shortening with the flour mix.
3. Add it all to a food processor and pulse about 12 times until the mixture is course and you can still see little pieces of shortening.
4. Drizzle the 3 T of ice water over the mixture and process just until clumps form. Do not let the ball come together. If the dough is too dry, add more water 1 teaspoon at a time until it is the desired consistency.
5. Form the dough into a ball and flatten it into a disc.
6. Wrap it in plastic wrap and refrigerate it for at least 30 minutes, preferably an hour or more.
7. Roll out the dough on a floured surface to a 12" round disc.