Toffee diamond bars


1¾ cups all purpose flour
1 cup sugar
2 sticks margarine (“I Can’t Believe It’s Not Butter”)
1 tsp. vanilla
1 large egg separated)
½ cup finely chopped walnuts

Preheat oven to 275°. Grease a 10x15" jellyroll pan. In large bowl combine all ingredients, except egg white and nuts. Beat on medium speed until soft dough forms. Put into the pan. Beat egg whites lightly with fork; spread on dough. Sprinkle on nuts. Bake for 1 hour and 10 minutes, until golden brown. Cut into 48 diamond shaped bars while still hot. Remove from pan; cool on rack.