Puff Pastry Pepperoni Pizza Roll

Name: Puff Pastry Pepperoni Pizza Roll
Ingredients: One 9-ounce sheet frozen puff pastry, thawed; 2 cups shredded part-skim mozzarella (8 ounces); 4 ounces thinly sliced salami, cut into bite-size pieces; 2 ounces sliced pepperoni; 1/4 cup grated Parmesan, plus more for sprinkling; 5 tablespoons plain dry breadcrumbs; 2 large eggs, beaten in separate small bowls; 2 tablespoons drained banana peppers, coarsely chopped; 1/2 teaspoon dried oregano, plus more for sprinkling; Kosher salt; Pinch of crushed red pepper flakes, plus more for sprinkling; All-purpose flour, for the work surface; 1 cup prepared pizza sauce, for dipping