Prepare the Beef:
In a bowl, mix sliced beef with cornstarch, soy sauce, and sesame oil. Let it marinate while preparing other ingredients.
Make the Sauce:
In a small bowl, whisk together soy sauce, oyster sauce, hoisin sauce, honey, rice vinegar, garlic, ginger, black pepper, and red pepper flakes. Set aside.
Cook the Stir-Fry:
Heat 1 tablespoon vegetable oil in a large skillet or wok over medium-high heat.
Add the marinated beef and stir-fry for 2-3 minutes, until browned. Remove from the pan and set aside.
In the same pan, add onions and bell peppers. Stir-fry for 3-4 minutes, until slightly tender.
Combine Everything:
Return the beef to the pan and pour in the prepared sauce. Stir well and cook for 2 minutes, until the sauce thickens and coats the beef and peppers.
Assemble the Rice Bowl:
Divide cooked rice into bowls and top with the beef and pepper stir-fry.
Garnish with green onions and sesame seeds.
Serve And Enjoy!
Serve hot and enjoy with extra soy sauce or chili flakes, if desired.