Giolitti is the oldest ice cream shop in Rome & in my opinion, calorie for calorie the best splurge you can make!!! And if you're looking for some adventure Italiano style, try one of their more rare varieties such as champagne, cassata siciliana, ricotta, marsala custard and rice.
Dal Bolognese is literally the best pasta restaurant in Rome! My husband dies for their entire menu. Not to mention, it's so chic and you'll always see one or two celebs.