In a mixing bowl combine egg white, cereal, Worcestershire sauce, and lemon peel. Add turkey; mix well. (Mixture will be soft.) Shape into 24 meatballs.
Arrange meatballs in a 12x7Ωx2-inch dish. Cover with waxed paper. Cook on 100% power (high) for 4 to 6 minutes or till meatballs are no longer pink, rearranging and turning meatballs over after 3 minutes. Drain off fat.
Meanwhile, for sauce, in a 4-cup measure stir together chicken broth, broccoli, carrot, and green onion. In a small bowl stir together yogurt and cornstarch; stir into vegetable mixture.
Cook sauce, uncovered, on high for 4 to 6 minutes or till thickened and bubbly, stirring after every minute till slightly thickened, then every 30 seconds. Stir in lemon juice; pour sauce over meatballs. Serve over noodles.