Step 1: Prepare the Beef

• In a bowl, toss the sliced beef with cornstarch, soy sauce, salt, and pepper. Let it marinate for about 10 minutes while you prepare the other ingredients.

Step 2: Heat the Oil

• Heat the vegetable oil in a large wok or skillet over medium-high heat until shimmering.

Step 3: Stir Fry the Beef

• Add the marinated beef to the hot pan in a single layer. Stir fry for 3-4 minutes until browned and cooked through. Remove the beef from the pan and set aside.

Step 4: Cook the Vegetables

• In the same pan, add the sliced onions, minced garlic, and ginger. Stir fry for about 3-4 minutes until the onions are tender and translucent.

Step 5: Combine and Serve

• Return the cooked beef to the pan with the onions. Add oyster sauce and hoisin sauce, tossing everything to combine. Cook for another minute to heat through. Garnish with chopped green onions before serving.