• Pizza dough – 1 large portion
• Olive oil – 2 tablespoons
• Mozzarella cheese – 1½ cups, shredded
• Bell peppers – 1 cup, sliced (mixed colors)
• Mushrooms – 1 cup, sliced
• Spinach – 1 cup, chopped
• Onion – 1 medium, thinly sliced
• Black olives – ½ cup, sliced
• Garlic – 2 cloves, minced
• Italian seasoning – 1 teaspoon
• Red chili flakes – ½ teaspoon
• Salt – ½ teaspoon
• Black pepper – ½ teaspoon
• Marinara sauce – for serving