1 cup canned sweet potato puree
3 egg yolks
1 cup milk
1 1/2 cups cake flour
1 tablespoon baking powder
1 tablespoon white sugar
1 teaspoon salt
1 teaspoon ground nutmeg
1/4 cup chopped pecans
3 egg whites
3 tablespoons butter, melted
2 tablespoons pecans, chopped