Yeah, "tomato pie" is common in places with a lot of transplants from that part of Italy as well, especially places with old school Catholics who didn't eat any animal/dairy products during lent (Philly, NYC and the surrounding NJ suburbs to name a few). I grew up eating the stuff. I've since tried vegan pizza with fake cheese, from a place with great vegan sandwiches, and it's not worth it compared to a pizza with no cheese. When I make focaccia, I toss some pizza sauce on top before throwing it in the oven and it's amazing.