Pargot
One of the tiniest yet most beautifully designed restaurants in Roma, this strangely wonderful bistro serves boldly flavored contemporary Mexican cuisine from a short, always-changing menu created by an alum of Pujol and El Bulli. Options might include a tostada topped with smoked leeks, recado negro (a charred Yucatecan chile paste) and avocado mousse, or an infladita (a fried, puffed tortilla) filled with crabmeat and corn and topped with a puree of spring peas and mint. It's a good idea to reserve a few days ahead.