-
1
Make the piecrust: Place all the ingredients except the egg yolk and ice water into a food processor fitted with a metal blade; pulse at 1-second intervals until the mixture resembles coarse crumbs. (Alternately, whisk together flour, sugar, and salt in a medium bowl. Cut in the butter and shortening with a pastry blender or 2 knives used scissors-fashion, until the mixture resembles coarse crumbs. Stir in the yolk and ice water.)
-
2
Add the egg yolk, and sprinkle on 1 tablespoon of the water. Pulse just until dough begins to clump together (add a little more water, if necessary). Don't overwork--this will make the dough tough. Turn dough out onto a large piece of plastic wrap, and press into a large, flat, hamburger-shaped disc. Wrap tightly, and refrigerate 30 minutes (or up to 2 days).
-
3
At least 20 minutes before baking, position a rack in the middle of the oven. Preheat the oven to 400u00b0. Place the dough on a clean tea towel lightly dusted with flour. Roll out to a 12- to 13-inch round. Transfer to a lightly buttered 9-inch glass pie plate. Gently press the pastry against the sides and bottom of the plate.
-
4
Trim away all but 1 inch of overhanging dough. Turn the edge under, and use a fork or your fingers to crimp the edge. Place in freezer 5 minutes. Place an 8-inch square piece of buttered foil, butter side down, on top of the crust bottom. Bake at 400u00b0 for 8 minutes; remove from oven. Discard foil, and lightly prick the bottom and sides of the crust with a fork. Bake 5 to 8 minutes longer, until surface is dry but not brown. Let crust cool on a wire rack while you make the filling. Position a rack on the lowest shelf in the oven; reduce oven temperature to 350u00b0.
-
5
Whisk together the filling ingredients in a large bowl until smooth, and pour into the piecrust. Carefully return the pie to the oven. Bake at 350u00b0 for 55 to 65 minutes, or until the center is firm and not jiggly. Transfer the pie to a wire rack to cool completely. To serve, cut into 8 wedges.
