Creating Teriyaki Chicken with Broccoli is simple if you follow these steps:

1. Prepare the Chicken: Cut the chicken breast into bite-sized pieces and set aside.
2. Blanch the Broccoli: In a pot of boiling water, blanch the broccoli florets for 2-3 minutes until bright green. Drain and set aside.
3. Make the Teriyaki Sauce: In a small bowl, whisk together the soy sauce, honey (or brown sugar), rice vinegar, minced garlic, and grated ginger.
4. Cook the Chicken: Heat the vegetable oil in a large skillet or wok over medium-high heat. Add the chicken pieces and cook for 5-7 minutes, or until cooked through and golden brown.
5. Add the Sauce: Pour the teriyaki sauce over the cooked chicken, stirring to coat evenly. Allow it to simmer for 2-3 minutes.
6. Thicken the Sauce: Add the cornstarch mixture to the pan, stirring constantly until the sauce thickens, about 1-2 minutes.
7. Combine with Broccoli: Add the blanched broccoli to the skillet, tossing to combine everything well.
8. Garnish: Remove from heat and sprinkle sesame seeds and chopped green onions on top as a finishing touch.
9. Serve: Serve hot over a bed of rice or noodles, if desired.

By following these simple steps, you can create a delicious Teriyaki Chicken with Broccoli that will impress everyone at your table.