Recently I stopped at the Mt. Hope Avenue Pontillo's. I got a cheese slice and a broccoli/tomato slice.
The cheese slice had a dry, firm underside that displayed some light charring. A little corn meal was visible underneath, as was a tiny bit of oven soot.
The crust was of thin to medium thickness, but this was a heavy slice. Some of the heft came from the thick, bready cornicione, but there was also a fair amount of cheese. It had migrated a bit away from one corner, due to the dough puffing up in the oven, but this slice was on the cheesy side, though not overly so. The cheese appeared to be all mozzarella, and had just slightly browned.
Pontillo's, 1687 Mount Hope Ave. 14620
Hours: Mon. - Thu. 10 a.m. - 11 p.m., Fri. - Sat. 10 a.m. - midnight, Sun. noon -10 p.m.