I RECENTLY ATE MY WAY through a family vacation to Italy while wearing two proverbial hats: American tourist and nutrition professional. As I sit here clearing my inbox of backlogged nutrition headlines – apparently, I missed the emergence of “The Potato Hack Diet” (a plan that would have us eating nothing but 2 to 5 pounds of plain, unadorned potatoes for up to five days, in case you missed it too) – I realize what a welcome break it was to spend two weeks eating traditional meals in a place with little interest in food fads.