STEP 1 - MARINATING THE BEEF Begin by gently combining the beef strips with salt, fragrant sesame seed oil, a pinch of white pepper, the egg white, 2 tablespoons of cornstarch, and 1 tablespoon of oil in a mixing bowl. This marinade ensures the beef becomes tender and develops a silky coating, crucial for that authentic stir-fry texture. Allow it to rest for a few minutes to absorb the flavors. STEP 2 - STIR FRY Heat 2 tablespoons of oil in a wok or large skillet until shimmering. Add the marinated beef and stir-fry over high heat until the beef turns a tempting golden brown—this seals in the juices and builds flavor. Once cooked, remove the beef and set it aside to rest. Add 1 tablespoon of oil to the wok, then toss in the minced ginger and garlic. Stir-fry these aromatics for just a few seconds until they release their fragrant scents—be careful not to burn them. Next, add the chopped vegetables: onions, carrots, green peppers, celery, and mushrooms. Toss them briskly to retain their vibrant color and crunch. Pour in the cooking sherry and 1 cup of water to deglaze the wok, letting the vegetables soften slightly. Mix in the oyster sauce, hot pepper sauce, and sugar, creating a harmonious balance of savory and spicy flavors. Return the cooked beef to the wok, add 1 tablespoon of soy sauce, and stir everything together. To achieve the perfect glossy finish, whisk 1 tablespoon of cornstarch with 2 tablespoons of water until smooth, then slowly dribble this slurry into the stir-fry while stirring constantly. Watch as the sauce thickens to a luscious coating that envelops every morsel. Adjust the sauce thickness to your liking and serve immediately for best taste and texture. TIP: For an extra burst of heat, sprinkle in some crushed red pepper flakes or add a dash of Szechuan peppercorn powder. Remember to cook the beef quickly on high heat to maintain its tenderness and avoid overcooking your crisp veggies for that perfect stir-fry mouthfeel.