PREPARATION:
- Combine sugar, cornstarch and mustard in small bowl. Blend soy sauce, water and vinegar into cornstarch mixture until smooth. Cut chicken into 1-inch pieces.
- Heat 2 teaspoons oil in wok or large nonstick skillet over medium heat. Add chicken and garlic; stir-fry 3 minutes or until chicken is cooked though. Remove and reserve.
- Add remaining 2 teaspoons oil to wok. Add bell pepper, celery and onion; stir-fry 3 minutes or until vegetables are crisp-tender.
- Stir soy sauce mixture; add to wok. Cook and stir 30 seconds or until sauce boils and thickens.
- Return chicken with any accumulated juices to wok; heat through. Serve over Chinese noodles. Garnish with celery leaves, if desired.
