Been here 2x, both for lunch.
The green focaccia bread in the bread basket is the best.
I only like green olives if I'm eating at Olives. =D
Tuna Carpaccio and Beef Carpaccio are both delish, order those if they sound even the least bit appealing.
If you like scallops and risotto...the Pan Seared Scallops are worth ordering. The new england style lobster roll is actually a sub...my cousin was like UUHHH, but it was still good because it was loaded with chunks of lobster and was flavorful.
Service is above average, and I'd come back again. It's not too pricey for its dining atmosphere and the fact that it's in Bellagio-welll of course for the food as well.
Definitely drop by if you're looking for a lunch spot and is staying or visiting Bellagio.