For lovers of burgers and fast food, the legend of the "secret menu" is a tantalising one, promising a secret club of tasty, cheap and ridiculously over the top food. Only one fast food outlet has openly confirmed having a secret menu -- and that's the infamous In-N-Out, which is sadly not available outside of the US (unless you make your own). So how do we go for secret menus here, in the land down under?