1) Preheat oven to 300 degrees.Spray an oblong baking pan with baking spray. I used a 14x8x2 pan.Cream butter; gradually add sugar and continue beating until mixture is light and fluffy.

2) Add egg yolk, flour, cinnamon, salt and vanilla.

3) Mix well; dough will be thick.Press dough evenly into prepared pan; crust will not be very thick.Lightly beat egg white and brush over top of dough.

4) Sprinkle nuts evenly over dough and lightly press nuts into dough.

5) Bake about 50 minutes or until edges are golden.

6) Remove from oven and cut into square while still hot.

7) Let cool and remove from pan with a spatula.Store in a tightly covered container; square will keep at a week.