Prepare the Beef: Begin by marinating the beef strips in a mixture of soy sauce, oyster sauce (if using), hoisin sauce (if using), and sugar for about 15 minutes. This will infuse the meat with rich flavors.

2. Ignite the Flavors: In a spacious skillet or wok, warm the vegetable oil over medium-high heat until shimmering. This step will create the perfect base for your dish, ensuring the aromatics release their delightful fragrance and enhance the overall flavor profile. Once hot, add the minced garlic and sauté for about 30 seconds until fragrant, being careful not to burn it.

Cook the Beef: Increase the heat to high, then add the marinated beef to the pan. Stir-fry for 2-3 minutes until the beef is browned and just cooked through.

Stir-Fry the Asparagus: In the same pan, add the asparagus pieces. Stir-fry for 2-3 minutes until they turn bright green and are tender-crisp.

Combine and Thicken: Return the beef to the pan. Add the water or beef broth, scraping up any browned bits from the bottom of the pan. Stir in the cornstarch mixture and let it simmer for another minute, until the sauce thickens to a glossy finish.

Season and Garnish: Taste and adjust the seasoning with salt and pepper as desired. Serve hot, garnished with sesame seeds or chopped green onions for an added crunch and flavor.