In a large bowl, toss the steak cubes with cornstarch, salt, and black pepper until evenly coated.
Heat the vegetable oil in a large skillet or wok over medium-high heat.
Add the steak bites to the skillet in a single layer, working in batches if necessary to avoid overcrowding.
Sear the steak for 2-3 minutes on each side, or until browned and cooked to your desired doneness. Remove from the skillet and set aside on a plate.
In the same skillet, reduce the heat to medium and add the honey, soy sauce, rice vinegar, brown sugar, garlic, ginger, and sesame oil. Stir to combine.
Simmer the sauce for 2-3 minutes, stirring occasionally, until it thickens slightly and becomes glossy.
Return the seared steak bites to the skillet and toss them in the sauce until evenly coated. Cook for 1-2 minutes, ensuring the glaze sticks to the steak.
Transfer the steak bites to a serving platter and garnish with sliced green onions and sesame seeds.
Serve hot with your favorite sides.
