Drain pineapple, reserving juice; set pineapple aside. In a small bowl, mix pineapple juice, cornstarch and ginger until smooth. Stir in broth, brown sugar, soy sauce and molasses., In a large resealable plastic bag, combine flour and seasonings. Add chicken, a few pieces at a time; close bag and shake to coat., In a large skillet, heat 4 tablespoons oil over medium heat. Add chicken; cook and stir until no longer pink. Remove from pan; discard cooking juices., Stir-fry vegetables in remaining oil until crisp-tender. Stir cornstarch mixture and add to pan. Bring to a boil; cook and stir 1-2 minutes or until sauce is thickened. Return chicken to pan. Add reserved pineapple; heat through. Serve with rice.