In a large skillet, over medium heat, cook onion and garlic in margarine until tender. Stir in salsa, sugar, cinnamon, cloves, and bay leaf; add chicken. Cover and simmer for 30 minutes. Remove chicken to heated platter; keep warm. In a small bowl, dissolve cornstarch in tomato sauce; stire into skillet. Cook, stirring constantly until the mix thickens and begins to boil. Add orange sections; heat through. Discard bay leaf. Serve chicken over rice with the sauce over all.