1.In A Nonstick Skillet, Saute The Mushrooms, Celery And Onion In Oil Until Tender. Combine The Cornstarch, Broth And Soy Sauce Until Smooth; Stir Into Vegetable Mixture. Bring To A Boil; Cook And Stir For 1-2 Minutes Or Until Thickened. 2.Reduce Heat To Medium-Low. Add The Turkey, Peas And Water Chestnuts; Cook Until Turkey Is Heated Through And Peas Are Tender. Serve Over Rice If Desired.