Add the chicken breast, sliced red onion, and peppers to a baking sheet.
Drizzle the chicken and vegetables with the olive oil, garlic powder, Italian seasoning, and salt and pepper.
Roast in the oven for 20 minutes, or until the chicken is cooked through and the veggies are soft.
In a bowl mix together the tomato puree and the barbecue sauce.
Slice the chicken and set aside.
Lightly dust a clean surface with flour and place the dough on it.
Divide the dough into two.
Stretch out each dough in circular motions to form a round base. Transfer each to its own baking sheet, stretching if needed until it comes close to all four sides of the pan.
Top each pizza with half the sauce mixture, mozzarella, and cheddar.
Top each pizza with half the oven roasted onions and peppers, sliced chicken, and corn.
Bake for 10 minutes, rotating racks halfway through, until the dough is golden and crisp and the cheese is melted and bubbling.
Serve immediately, topped with fresh oregano and a drizzle of garlic oil, and with jalapeño slices and garlic sauce on the side, if using.