For Pie Crust: In food processor, place 1 1/4 cups flour, the sugar and 1/8 teaspoon salt; cover and process until combined. Add the butter; process until it looks like yellow cornmeal mixed with bean-sized bits of butter, about 10 pulses. Add the egg, and pulse 1 to 2 times; don't let the dough form into a ball in the machine. (If the dough is very dry, add up to a tablespoon more of cold water.) Remove the bowl from the machine, remove the blade, and bring the dough together by hand.