PLACE bread on baking sheet. Remove top one-fourth of loaf. With fingers, hollow out bread top and bottom without breaking through crust.
SPREAD Italian dressing evenly inside bottom of loaf. Place half of provolone cheese slices across bottom of bread. Layer the following ingredients: salami, olives, sausage, onion, mortadella, pizza sauce, pepperoncini, pancetta, turkey, sun-dried tomatoes, Parmesan cheese, pesto and remaining slices of provolone.
REPLACE top onto bread. Place another baking sheet on top of bread and top with a 5 to 10 pound weighted object. Allow to sit for 30 minutes to 1 hour. Sandwich should be compressed, but not smashed. Cut into wedges and serve.