
A classic Cantonese-style stir-fry featuring tender velveted beef and crispy pan-seared tofu tossed in a savory ginger-scallion sauce. This balanced, high-protein meal comes together quickly for a perfect weeknight dinner served over steamed rice.
Prepare the beef by thinly slicing the flank steak against the grain into 2.5-inch pieces. In a medium bowl, combine the beef with 1.5 tablespoons of water, cornstarch, 1 teaspoon of oil, oyster sauce, and baking soda. Mix well and let marinate for 20-30 minutes to tenderize the meat.
While the beef marinates, slice the firm tofu into rectangles roughly 1/4 to 1/2 inch thick. Set aside.
In a small bowl, whisk together the sauce ingredients: hot water, sugar, hoisin sauce, dark soy sauce, light soy sauce, sesame oil, and white pepper. Stir until the sugar is completely dissolved.
Prep the aromatics and vegetables: slice the red bell pepper into strips, peel and slice the ginger into thin coins, and mince the garlic. Cut the scallions into 2-inch lengths, splitting any thick white parts in half lengthwise.
Heat a wok or large skillet over high heat until it begins to smoke. Add 1 tablespoon of oil to coat the surface. Lay the tofu slices in a single layer and sear for about 2 minutes per side until golden brown and slightly crispy. Remove and set aside on a plate.
Reheat the wok until smoking again and add another tablespoon of oil. Spread the beef in a single layer and sear undisturbed for 1 minute. Stir-fry for an additional 30 seconds until the beef is about 80% cooked through, then remove from the wok and set aside.
Add the remaining 1/2 tablespoon of oil to the wok. Toss in the ginger slices and stir-fry for 20 seconds to infuse the oil. Add the garlic, scallion whites, and red bell pepper. Stir-fry on high heat for 10 seconds, then pour in the Shaoxing wine to deglaze.
Return the seared tofu and beef (including any accumulated juices) to the wok. Pour in the prepared sauce mixture and stir-fry for 20-30 seconds until the sauce thickens slightly and coats all ingredients evenly.
Toss in the scallion greens and stir-fry just until they begin to wilt. Serve immediately with a side of steamed jasmine rice.
For the best results, ensure your wok is piping hot before adding ingredients to achieve 'wok hei' (breath of the wok). If you prefer extra crispy tofu, press the tofu block between paper towels for 15 minutes before slicing to remove excess moisture. The baking soda is a traditional Chinese technique called 'velveting' which keeps the beef incredibly tender even at high heat.