First of all, parbaking creates a lot more work than should be necessary, and it probably doesn’t help you achieve the results you crave. I’ve thought a lot about parbaking, and I see no reason to ever parbake any kind of pizza, either in a pizzeria setting or at home.
Aluminum pans surely work fine, but I think tin-plated steel pans are the most appropriate pans for deep dish. The darker the better.
The formula I’ve been using most recently for deep dish:
100% Pillsbury AP flour
58% Water
0.30% ADY
21% Corn oil
Malnati’s dough has no salt, cornmeal, or semolina, and it’s not hard to find proof. (Just google “Lou to go” or something like that, then click “Images” at the top of the results page.) Their dough does contain a small percentage of olive oil, but I substitute more corn oil for the olive oil because using both creates more work but no noticeable difference in the pizza.
I’ve been wanting to try Superlative flour, although I suspect it has too much protein to work well with deep dish. However, that may be exactly what you want. Maybe I’ll try it soon.
Although I think my deep dish is every bit as good as Malnati’s, if not better, I still have a ton to learn about this style.
I have at least one more post on the way.