Marinate the beef
Mix sliced beef with soy sauce, oyster sauce, black pepper, garlic powder, onion powder, cornstarch, and oil.
Marinate for at least 10 minutes (up to 1 hour for deeper flavor).
Prepare garlic flakes
Heat a small pan over low heat with oil
Add minced garlic and cook slowly, stirring frequently, until golden brown and crisp.
Remove immediately and drain on paper towels.
Cook the beef
Heat a pan over medium-high heat with garlic oil, sear beef quickly (1–2 minutes) until just browned but still tender.
Remove and keep warm.
Build the creamy mushroom sauce
In the same pan, heat garlic oil + butter. Sauté mushrooms until lightly browned.
Add beef broth + heavy cream together and stir in soy sauce, oyster sauce, and sugar.
Season with black pepper and MSG at this stage.
Simmer gently 3–5 minutes until sauce is creamy and slightly thickened.
Combine & finish with garlic flakes
Return beef to the pan, tossing to coat in the creamy mushroom pepper sauce.
Stir in the garlic flakes at the end, just before serving, so they stay crunchy.
Spoon over hot steamed or garlic fried rice.
Top with extra garlic flakes and spring onions if desired
