The Supreme Pizza

Name: The Supreme Pizza
Ingredients: All-purpose flour, for dusting; Two 8-ounce balls of pizza dough, thawed if frozen; 1/4 cup extra-virgin olive oil, plus more for brushing; 2/3 cup crushed tomatoes; 1 packed cup coarsely chopped mustard greens; 1 cup shredded provolone piccante cheese (3 ounces); 4 thin slices of mortadella (3 ounces), chopped into 1-inch pieces; 1/4 small red onion, thinly sliced; 3 ounces fresh mozzarella cheese, thinly sliced; 1 tablespoon crushed red pepper; Grated Grana Padano cheese, for garnish