Cook chicken in cooking oil in non- stick frying pan. Sprinkle with salt and pepper. Transfer to medium bowl.

Add celery, mushrooms, onion, and green pepper to same frying pan. Saute until soft.

Add pineapple with juice. Heat and stir until boiling.

Mix water and cornstarch in small bowl. Add remaining 5 ingredients. Mix. Stir into vegetable mixture until boiling. Add chicken. Return to a boil. Serve immediately.