One of my favorite squares and the inspiration for my pepperoni square. I spent a lot of time trying to figure it out. Kenji's recipe is off especially when it comes to the cheese.
This will get you really close.
60% hydration dough pressed out in an olive oiled pan and left to rise undisturbed until very well proofed. Sliced FRESH mozzarella cheese layed on the dough. A cooked far diavola sauce. Use nice plum tomatoes, ROASTED garlic, a pinch of red pepper flakes and a good amount of sugar; princes sauce has a little heat, some sweet, no marinara or raw garlic taste. A certain brand of hormel pepperoni (super important; It curls up and bakes a certain way. The uncooked product is deceiving...) and then a healthy sprinkle of pec on top of it all before baking for about 12 minutes with a final crisp on the stone
This will give you princes exact pie.
As I mentioned above after having their spicy slice a few times now I really like it and would like to be able to duplicate it. It's kind of a hot mess but so good.