Sesame Glazed Beef with Crisp Bok Choy

1. Beef Marinade

Slice the steak lengthwise along the grain into three equal parts. Cut each part across the grain into ¼-inch thick strips. In a large bowl, whisk together 1 tablespoon oyster sauce, cornstarch, 1 tablespoon soy sauce, and baking soda. Add the steak strips, tossing to coat them evenly. Set aside to marinate.

2. Sauce Mixture

In a small bowl, combine 1/4 cup water, brown sugar, the remaining 3 tablespoons of oyster sauce, and the remaining 1 tablespoon of soy sauce. Whisk until well mixed and set aside.

3. Sear the Beef

In a 12-inch nonstick skillet, heat 1 tablespoon of toasted sesame oil over high heat until it's shimmering and nearly smoking. Carefully add the marinated beef, spreading it out to avoid clumps. Cook without stirring for about 4 minutes, or until the beef starts to brown. Stir the beef, continue cooking for another 4 minutes or until the pieces are browned and cooked through.

4. Add Aromatics and Sauce

To the skillet, add the sliced white parts of the scallions and minced garlic, stirring briefly. Pour in the sauce mixture prepared earlier and stir to combine.

5. Steam Bok Choy

Place the halved baby bok choy on top of the beef mixture. Cover the skillet and allow it to cook for about 4 minutes, or until the bok choy is tender. Shake the skillet occasionally to prevent sticking.

6. Final Touches

Once the bok choy is tender, uncover the skillet. Sprinkle the dish with the sliced green parts of the scallions and drizzle with the remaining 1 tablespoon of toasted sesame oil.