Orange Pecan Shortbread
["1/2 c. butter", "1/3 c. sugar", "2 egg yolks", "1 tsp. vanilla", "1 1/4 c. flour", "1/4 tsp. each: soda and salt", "1 c. orange marmalade", "2 egg whites", "1 Tbsp. sugar", "1/2 c. chopped pecans", "pecan halves"]
["Cream butter and sugar.", "Add egg yolks and vanilla.", "Add sifted flour with soda and salt.", "Press into bottom and sides of 9-inch pie pan.", "Spread marmalade on top.", "Sprinkle on pecans. Top with stiffly beaten egg whites.", "Arrange pecan halves on top. Sprinkle with 1 tablespoon sugar.", "Bake at 350\u00b0 until meringue is lightly browned."]
["butter", "sugar", "egg yolks", "vanilla", "flour", "soda", "orange marmalade", "egg whites", "sugar", "pecans", "pecan halves"]