When I stopped by at my local Trader Joe's this morning, I picked up their little leaflet on my way out.
When I flipped through the pages, I came across their frozen version of the Pizza Margherita. Anyway, there was also posted a little historical fact and that was that the first pizza oven in Naples was fueled by lava from nearby Mt. Vesuvius! Now, whether that's a true fact or not I can't say albeit me trying to find anything on it online:http://www.eatmedaily.com/2009/03/things-we-learned-from-trader-joes-culinary-compendium/
Scroll down until you see "Pizza Margherita".