Combine 2 1/2 tablespoons soy sauce, sherry, and garlic powder in bowl. Mix well. Put-in the beef. Let it stay for 15 minutes.
Add the cornstarch in the bowl with the beef. Mix well.
Meanwhile, cook the egg noodles according to package instructions. Set aside.
Heat the cooking oil in a pan. Once the oil gets hot, saute the marinated beef. Cook for 3 to 5 minutes.
Add the broccoli. Cook for 2 minutes.
Add the cooked egg noodles. Toss and cook for 2 to 5 minutes.
Mix the oyster sauce, remaining soy sauce, sugar, ginger, salt and pepper in a bowl.
Pour the mixture on the noodles with beef. Cook for 5 to 7 minutes in medium heat while tossing once in a while.
Transfer to a serving plate.
Serve. Share and enjoy!