For the most authentic Katz chew, use high-gluten bread flour and don't skip the boil.
Katz keeps toppings simple—classic is just sauce + mozzarella. Avoid overloading to prevent sogginess.
Make-ahead: Boil and flatten the bases, then freeze. Thaw, top, and bake when ready.
Variations: Add pepperoni for a supreme twist, but the original from Katz Bagel Bakery is often plain cheese.