Back in Chicagoland for a bit and hitting all the spots. Had Lou's out in Schaumburg tonight. Awesome as always. Actually worked there for Christmas break in 1989 as a busboy. I had no interest in cooking at the time so couldn't care less what was going on in the kitchen. I do remember seeing those huge mixers in the basement that I now know are just good 'ole Hobarts. Anyhow after eating I got to thinking and was poking around and around found this video on the Lou's site:
https://www.loumalnatis.com/blog/lous-ingredients-series-tomatoes/Check out mark 0.55 and 1:02
What's in the background? Two different posters for San Benito tomatoes in the tasting lab! Additionally at mark 2:36 you see those yellow cans they used to or still use and on the can it says Hollister, Ca which is where San Benito is located, not Modesto.
More tidbits: if you check out mark 2:05 to 2:10 you'll see the boxes being prepared for shipping. It's hard to see but says "something something" of tomatoes with added tomato Puree. Also just below in the comment section someone states they recently found out they were allergic to garlic and onions and was wondering if the sauce contained them and on June 12, 2017 Lou Malnati's replies, "Hello Ellen, our pizza sauce does not contain garlic or onions." After tasting it again finally I have a feeling they don't add anything to the tomatoes or maybe just salt (prolly a hit of sugar too.) Does anyone have the ingredient list of that can?
There's also a dough video that you get to see some good close up shots of the dough.