Cooking this dish is like telling a story, each step a chapter filled with flavor and anticipation. Here’s how you can bring this dish to life:

1. In a medium bowl, combine the sliced steak with soy sauce and cornstarch. Let it marinate for at least 15 minutes. This step is crucial as the cornstarch helps to tenderize the meat, a trick I learned from my endless kitchen experiments.
2. Heat 1 tablespoon of vegetable oil in a large skillet over medium-high heat. Add the marinated steak slices and cook until browned, about 3-4 minutes per side. Transfer the steak to a plate and set aside.
3. In the same skillet, add the remaining tablespoon of oil. Toss in the sliced onions and bell peppers. Stir-fry until they begin to soften, about 5 minutes. The vibrant colors and sizzling sounds always remind me of the lively kitchen chatter back home.
4. Add the garlic and ginger to the skillet, cooking until fragrant, about 1 minute. These fragrant staples are like the culinary heartbeats of many dishes, including this one.
5. Return the steak to the skillet, along with the oyster sauce, hoisin sauce, and sesame oil. Stir everything together, ensuring the steak and veggies are well coated. Let it cook for another 2-3 minutes, allowing the flavors to meld beautifully.
6. Season with salt and black pepper to taste. Garnish with sliced green onions before serving. This final touch adds a fresh and vibrant element, much like my grandmother’s habit of adding a sprinkle of love to every dish.