After a busy lecture at the Vatican Museum, several colleagues and I had lunch at this small, clean and friendly bistro. Luma had at least a dozen daily specials for first and second courses, and the pasta is fresh and truly cooked al dente. It is packed after 13.00, and seats are difficult to come by both inside and out, but the spaghetti (more like bucatini) pomodoro con formaggio is ridiculous with flavour for so basic a dish and if you are a connoisseur of pannacotta (as I fancy myself), then this is definitely top three ever!