Homemade Italian Stromboli with Savory Filling and Golden Crust

Ingredients

• 1 lb (450 g) pizza dough, homemade or store-bought
• 1 tablespoon olive oil
• 1 teaspoon garlic powder
• 1 teaspoon Italian seasoning
• 1/4 teaspoon crushed red pepper flakes, optional
• 1/2 cup (45 g) finely grated parmesan cheese, divided
• 4 oz (115 g) thin-sliced deli ham
• 6 oz (170 g) low-moisture mozzarella, sliced or shredded
• 4 oz (115 g) thin-sliced pepperoni
• 4 oz (115 g) provolone cheese, sliced
• 4 oz (115 g) thin-sliced Genoa salami
• 1/3 cup (55 g) roasted red peppers, patted dry and thinly sliced
• 1 large egg beaten with 1 tablespoon water
• 1/2 teaspoon dried oregano
• 1 cup (240 ml) warm marinara sauce, for dipping