Although there are plenty of great Italian restaurants in the City, if you're looking for a great pizza and salad (and the bestest rolls ever!), definitely check out Bertucci's. It's reasonably priced and very good and you always know the quality you're getting.
The lunch special is particularly good because you get an all you can eat salad plus pizza for a reasonable price, and there's usually leftovers for dinner.
It does get crowded at times, but the service is usually quick and friendly.