I have two favorite go-to dishes:
The first is the carcioffi salad (artichokes, pistachios and warm parmesan slices). The other is the ravioli, and depending on the season, you may get the butternut squash or pumpkin. The spinach and four-cheese are also great options.
They always offer a lagniappe of lemon sorbet between dishes and limoncello for dessert - on the house.
I do have to mention - we took some good friends to Fiamma one night hoping they too would love the restaurant and we ended up having a really ODD server. If you get her (believe me you'll know) please give the place another chance.