Press-in Shortbread Crust

Martha Stewart Living, 11/09, p. 171

2 oz. (4 T) unsalted butter, softened

3 T sugar

1 large egg yolk

1 C flour

1 tsp coarse salt

Stir together butter and sugar in a medium bowl.  Stir in yolk.  Add flour and salt, and stir until mixture is dry and crumbly.  Press dough into bottom and up sides of a 9-inch pie dish.  Freeze until firm, about 20 minutes.  Meanwhile, Preheat oven to 375.

Bake, rotating halfway through, just until crust turns golden brown, 20 -22 minutes.  Let cool in dish on a wire rack.  Fill