This cake idea we BORROWED from Bob Blumer on the Surreal Gourmet. The bun is 2 layers of white cake, the patti is a brownie, the mustard is mango coulis, the ketchup is raspberry coulis, the relish is green Jello and the mayonaise (we're Canadian, we put Mayo on burgers) is white butter cream icing. And don't forget the fries! Toasted pound cake. It was very yummy!