According to a recent Doxa research, nearly one out of three Italians confirm that they eat “American-style” sandwiches every day, and 80% declare to have one at least once every month. The most expensive hamburger in the world costs 1,400 euros - made of Kobe meat savoured with foie gras and slivers of truffle, you can find it in Las Vegas.Today 28th May is world hamburger day - the original meat...