Chris gave me a can of his tomatoes, which were an italian san marzano. Unfortunately I forget the brand, but I remember pete taylor buying a case of them to try out. Both of us decided that while they were excellent tomatoes, we actually both had other brands that we each personally preferred. At the pizzeria chris' sauce was very simple just like most pizzerias. I would be very surprised if it was cooked first, as it did have a nice fresh flavor. I think the only additives I noticed was salt and maybe maybe a tiny touch of sugar, but I am not sure about the latter. If you go to your local stores and buy a number of italian tomatoes (don't have to be san marzanos, just italian) you will no doubt find a tomato that will let you make a very similar sauce. Good luck with your quest, and report back to the forum with your favorite tomato after testing!