Creating a flavorful Beef & Onion Stir-Fry is straightforward when you follow these easy steps:

1. Marinate the Beef: In a medium bowl, combine the sliced beef with soy sauce and cornstarch. Toss to coat and let it marinate for about 10 minutes.

2. Prepare the Vegetables: While the beef marinates, slice the onion, bell pepper, and prepare the broccoli. Set aside.

3. Heat the Oil: In a large skillet or wok, heat 2 tablespoons of vegetable oil over medium-high heat until shimmering.

4. Stir-Fry the Beef: Add the marinated beef to the hot pan. Stir constantly until the beef is browned and cooked through, about 3-4 minutes. Remove the beef from the pan and set aside.

5. Cook the Onions and Veggies: In the same pan, add another drizzle of oil if needed and toss in the sliced onion and bell pepper. Stir-fry for about 2-3 minutes until they begin to soften.

6. Add Garlic and Ginger: Add the minced garlic and ginger. Stir continuously for about 30 seconds until fragrant.

7. Combine the Ingredients: Add the broccoli and cooked beef back into the pan. Stir well to combine all ingredients.

8. Final Touches: Season with salt and pepper to taste. Cook for an additional 2-3 minutes, allowing everything to heat through and the flavors to meld.

9. Garnish: Remove from heat and sprinkle with sesame seeds and sliced green onions before serving.

10. Enjoy: Serve immediately with steamed rice or noodles for an authentic taste!