1Beat egg white, salt, sherry and oil in medium glass or plastic bowl. Stir in shrimp. Stir in 1 1/2 tablespoons cornstarch. Cover and refrigerate at least 30 minutes but no longer than 8 hours.
2Mix broth, soy sauce, gingerroot and 1 1/2 teaspoons cornstarch.
3Cook noodles as directed on package; remove noodles from cooking water with tongs and drain well. Stir shrimp into boiling noodle water. Gently stir in circular motion about 2 minutes or just until shrimp are pink; drain.
4Spray nonstick wok or 12-inch skillet with cooking spray; heat over medium-high heat until cooking spray starts to bubble. Add green onions, bok choy and celery; stir-fry 3 minutes. Add broth mixture; cook and stir 1 1/2 minutes. Stir in noodles and shrimp; heat through.