Slice the flank steak thinly against the grain for tender pieces. Season with salt, pepper, and cornstarch. Toss to coat evenly—this helps lock in the meat’s juices.
Prepare your broccoli florets, onion, garlic, and ginger so everything’s ready to go.
Step 2: Make The Sauce
In a small bowl, whisk together shoyu, oyster sauce, brown sugar, and beef broth. Set aside.
Step 3: Cook The Beef
Heat 1 tbsp oil in a large pan or wok over medium-high heat.
Add the beef in batches to avoid overcrowding, cooking each side for about 1-2 minutes until browned. Remove from the pan and set aside.
Step 4: Stir-Fry The Veggies
Add the remaining oil to the pan. Toss in the onion, garlic, and ginger, stirring for about 1 minute until fragrant.
Add the broccoli florets and stir-fry for 2-3 minutes until they turn bright green and slightly tender.
Step 5: Combine And Serve
Return the beef to the pan. Pour in the sauce and stir everything together.
Let the mixture simmer for 2-3 minutes, allowing the flavors to meld and the sauce to thicken slightly.