Mix flour, salt and pepper in shallow dish. Coat chicken evenly with flour mixture.
Heat 2 tablespoons of the oil in large skillet on medium-high heat. Add chicken; cook and stir 5 minutes or until lightly browned. Remove chicken from skillet. Heat remaining 1 tablespoon oil in skillet. Add mushrooms, onions and bell peppers; cook and stir 5 minutes on medium heat or until tender.
Stir in remaining ingredients. Bring to boil, stirring frequently. Return chicken to skillet. Reduce heat to low; cover and simmer 5 minutes or until chicken is heated through. Serve over cooked pasta or rice, if desired.