Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/2  cup           flour
   1      tablespoon    powdered sugar
   1      dash          salt
   3      tablespoons   butter or margarine
   1                    egg yolk

Preparation:

Mix together flour, powdered sugar and salt. Cut in butter until mixture is uniformly crumbly. Stir in egg yolk. Press dough together; divide into two equal parts. Press pastry evenly into two 4 inch tart pans. Pierce bottom and sides all over with a fork. Bake in a gas oven at 425 degrees F. for 8 to 10 minutes or until golden brown. Cool in pans on a rack or carefully remove shells to fill.