That, said Mr Borthwick, was the best hamburger I ve ever tasted! Joe has just created the yummiest, juciest, most delicious hamburger ever and his friend Mr Borthwick wants to sell it in his new hamburger shop. But there s a problem Joe has completely forgotten the recipe and the shop is opening very soon.A pinch of this, a touch of that and a spoonful of something else the race is on for Joe to remember!