1/2 lb Sweet butter
1/2 cup Sugar
1 x Egg yolk
1/2 tsp Salt
2 1/2 cup Flour
4 x Egg whites
1 cup Sugar
3/4 cup Finely ground walnuts
1 tsp Lemon extract
Blackberry jelly

Cream butter and sugar; add egg yolk and salt. Add and salt. Add flour gradually and beat. Pat dough into thin layer in 12 x 12 inch pan. Beat egg whites; add sugar until stands in stiff peaks. Fold in ground nuts and flavoring. Spread jelly over and swirl meringue on top. Sprinkle with chopped nuts; bake at 350 F about 45 minutes. When warm, cut in squares.