Heat the oil in a deep, straight-sided skillet set over medium heat. Crumble in the chicken. Cook for 5 minutes or until browned. Add the onion, garlic, herbs and salt. Cook, stirring often, for 5 minutes or until softened. Add the tomatoes and bay leaf; bring to a boil. Simmer, stirring occasionally, for 30 minutes or until reduced.
Toss the cooked orcchiette with the tomato sauce. Transfer to a 9x13-inch casserole dish. Preheat the broiler to high; position the rack to the center of the oven. Toss the mozzarella with the Parmesan cheese and parsley; sprinkle over the pasta. Broil for 5 minutes or until cheese is melted and lightly browned.
Rest for 5 minutes before serving.
