The two foods that I ate the most of while in and around Naples were Mussels and Mozzarella. Both were FANTASTIC! The Mozzarella di Bufala in the Campania region was some of the best I had ever had and the seafood was delicious and fresh.
I didn't take many photos of the food that I ate (silly me!). I always seem to remember after I'm halfway through the plate and its never quite as pretty half eaten as it was when I began. So, you'll have to do with a single photo of Spaghetti con Cozze, Spaghetti with Mussels - a dish I highly recommend if you visit Naples.
I'd also recommend a visit to Fratelli la Bufala if you ever come across one of their restaurants. We visited their restaurant in Pozzouli, a small suburb of Naples. Apparently they are a chain that originated in the Campania region and their food is awesome.