1: Pre-heat the oven to 400 degrees.
2: In a 12-14 inch skillet over medium heat, cook the bell peppers for about 2 minutes per side, then remove and set aside.
3: Cook the onions until fragrant and softened, then set aside.
4: Turn off the heat, liberally oil the pan and arrange pepperoni and Calabrese on the bottom of the skillet.
5: Layer with bell peppers, then onions, followed by Parmesan, mozzarella, and pizza sauce.
6: Cover with pizza dough and brush with olive oil.
7: Place in the oven for 25-30 minutes or until the pizza dough is golden brown.
8: Carefully place a baking sheet over the top of the skillet and flip quickly.
9: Place back in the oven for another 5-10 minutes at 450 degrees or until pepperoni is crispy.
