Combine sherry, soy sauce, ginger, garlic, oil, and pepper pods. Place beef steak in plastic bag; add marinade. Close bag securely and marinate 15 minutes. Pour off marinade. Reserve.
Heat nonstick skillet over medium heat 5 minutes. Add steak and cook 12 to 5 minutes for rare to medium, turning once. Remove steak to cutting board and keep warm.
Dissolve 2 tablespoons cornstarch in reserved marinade and 1/4 cup water; add to skillet. Bring to a boil, stirring constantly. Stir in noodles. Carve steak into thin slicesand serve over noodles. Sprinkle with green onion.