Preheat oven to 350* Butter a cake 10" round cake pan In food processor combine nuts, four and baking powder. Pulsed tochopped nuts finely. IN large bowl, beat egg yolks and sugar together. In another bowl, beat egg whites until stiff. Fold whties ito yolk mixture. Fold in nut mixture. Stir in vanilla. Spoon into cake pan. Bake 30 minutes until golden. In saucepan over medium heat, add sugar and half and half and stir until sugar dissolves. Simmer gently without stirring until caramelized. Remove from heat, stir in butter. Let cool. Drizzle over cake and tkop with shipped cream