Roll out pizza dough into a 25 cm lightly greased pizza tray. Spread pastry cream evenly over pizza base. Slice bananas and arrange onto base, sprinkle with macadamias and brown sugar. Bake at 475? F for 7-8 minutes. Once cooked, drizzle with caramel sauce and top with vanilla bean gelato.
Combine cream, egg yolks, sugar and vanilla. Brink milk to boil and whisk in egg mixture. Whisk in flour. Place mixture into clean saucepan and return to low heat. Slowly cook, stirring until coats back of spoon.