Step 1: Prepare the Ingredients

Begin by slicing the steak thinly against the grain. This technique shortens the muscle fibers and ensures a tender bite. Slice the onion, bell pepper, and carrot, and separate the broccoli into small, bite-sized florets. Set the prepared ingredients aside.

Step 2: Make the Sauce

In a small bowl, whisk together soy sauce, oyster sauce, sesame oil, cornstarch, rice vinegar, honey, garlic, and ginger. This savory and slightly sweet sauce will coat the ingredients in flavorful goodness. Set the sauce aside until ready to use.

Step 3: Sear the Steak

Heat 1 tablespoon of vegetable oil in a large skillet or wok over high heat. Once the oil is shimmering, add the sliced steak in a single layer. Cook for 2–3 minutes on each side, allowing it to develop a golden-brown crust. Remove the steak from the pan and set it aside on a plate.

Step 4: Cook the Vegetables

In the same skillet, add the remaining tablespoon of vegetable oil. Toss in the onions and stir fry for 2 minutes until slightly softened. Add the broccoli, bell peppers, and carrots, and continue to stir fry for an additional 3–4 minutes until the vegetables are crisp-tender.

Step 5: Combine Everything

Return the cooked steak to the skillet along with any juices that have accumulated on the plate. Pour the sauce over the steak and vegetables, tossing to coat everything evenly. Cook for 1–2 minutes, stirring frequently, until the sauce thickens and clings to the ingredients.

Step 6: Serve and Garnish

Transfer the onion steak stir fry to a serving dish or individual plates. Garnish with sliced green onions and sesame seeds for an extra layer of flavor and presentation. Serve immediately with steamed rice or noodles for a complete meal.