In a large skillet, heat olive oil over medium heat. Place the onions, salt and pepper in the heated oil and lower the heat. Cook 12-15minutes, stirring often. Onions should caramelize and become brown, but not burn. Add the garlic and cook 3 minutes more.
Combine the onion mixture, chicken, and half of the BBQ sauce in a mixing bowl. Brush the remaining barbecue sauce on the top of each prepared pizza crust. Distribute the chicken mixture over the barbecue sauce. Combine the cheese. Top each pizza with the cheese mixture. Divide the roasted bell pepper strips over the top of the cheese.
Prepare the grill. Cook the pizzas, covered, over indirect medium heat or in a 400 degree oven until the topping is hot and the cheeses have melted.
Allow the pizzas to cool slightly before cutting.
Yield: 6 servings