Marinate the BeefIn a bowl, mix the soy sauce, cornstarch, Shaoxing wine, sesame oil, baking soda, and vegetable oil. Add the sliced beef, coating evenly, and let it marinate for about 10-15 minutes. This marinade will tenderize the beef and infuse it with flavor.

Prepare the SauceIn a separate small bowl, combine the Shaoxing wine, oyster sauce, dark soy sauce, cornstarch, black pepper, cold water, and sugar. Stir until smooth, then set aside. This will be the savory glaze that coats the beef and onions.

Stir-Fry the IngredientsHeat a large skillet or wok over medium-high heat and add the oil. Once hot, add the marinated beef, spreading it into a single layer. Allow it to sear for 1-2 minutes on each side until it browns. Remove the beef and set aside.

Cook the AromaticsIn the same pan, add a little more oil if needed, and add the white parts of the scallions, onion slices, and minced garlic. Stir-fry for about 2 minutes until the onions soften and begin to caramelize.

Combine and FinishReturn the beef to the pan, adding the sauce. Stir everything together, letting the sauce thicken and coat all the ingredients, about 1-2 minutes. Add the green parts of the scallions in the final 30 seconds.

ServeTransfer the beef and onion stir-fry to a serving platter and enjoy it hot! It’s perfect over steamed rice, noodles, or even cauliflower rice for a low-carb option.