Crust Combine flour and sugars. Mix in margarine until thoroughly blended. Add egg yolks and vanilla. Mix until smooth or blend in food processor until mixture comes together. Press with floured fingers in a 10 by 15 by 1/2 inch cookie sheet with sides. Bake at 350°F for 13 to 18 minutes or until light golden. Cool slightly about 20 minutes. Spread melted chocolate over base. Sprinkle nuts on top. Press in lightly. Cool until chocolate sets. Cut into squares or triangles. Yield about 100 pieces.