Combine soy sauce, ginger, garlic powder, ground black pepper, and sherry (or Chinese cooking wine) in a bowl. Mix well. Set aside
Meanwhile, heat the cooking oil in a wok or wide pan.
Once the oil gets hot, slowly add the beef slices. Stir fry for 1 to 2 minutes until the beef turns brown.
Add the onion. Cook for 1 minute.
Put-in the mushrooms and snow peas. continue to stir fry for 1 minute.
Pour-in the soy sauce mixture. Stir. Make sure that all the ingredients are blended properly. Continue to cook for a minute.
Pour-in the beef broth. Let boil. Add the cornstarch diluted in water. Stir. Cook until the sauce gets thick.
Add salt if needed.
Transfer to a serving plate. Serve.
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