Trim fat from steak, slice thin across grain.
Place in bag with vinegar, 3 tbsp soy, 1 tbsp sesame oil, garlic, and ginger. Marinate 1+ hours.
Boil noodles per package, rinse under cold water. Drain well.
Boil broccoli and sweet corn for 3 minutes. Drain.
Heat wok 5 minutes. Sear beef in oil 2-3 min. Remove.
Stir-fry vegetables 5 min. Push aside, scramble egg, mix together.
Add noodles, beef, remaining marinade. Stir-fry 2 min.
Add oyster sauce, rest of soy/sesame oil. Mix well. Serve with chili oil.
