1In small bowl, mix juice, soy sauce and cornstarch until cornstarch is dissolved; set aside.
2In 12-inch wok or nonstick skillet, heat oil over medium-high heat. Cook chicken in oil 4 to 5 minutes, stirring frequently, until no longer pink in center. Add carrots; cook 2 to 3 minutes. Add broccoli, mushrooms, water chestnuts and water; cook 3 to 4 minutes longer, stirring frequently, until vegetables are crisp-tender.
3Reduce heat to low. Stir juice mixture, then stir into chicken mixture. Cook and stir 1 minute or until sauce is slightly thickened. Sprinkle individual servings with 1 tablespoon cilantro.