Evolution of foods

Some scientist have analysed the evolution of recipes through time in four different cookbooks, and concluded that traditional cuisine evolve quite slowly, mosty because special ingredient are difficult to replace.

I wonder if some sort of tree of cooking could be built from gastronomic traditions of various populations and how it would relate to migrations, either known or presumed to have happened before historical records began...

update: in fact, since recipes are memes, as in the original definition of Dawkins, it may really turn out to be an interesting exercise...