Slice the chicken breast into thin strips, chop the zucchini and any additional vegetables, and mince the garlic.

In a bowl, whisk together the soy sauce, oyster sauce (if using), honey, and sesame oil.

Heat 1 tablespoon of vegetable oil in a large skillet over medium-high heat. Add the sliced chicken and season with salt and pepper. Stir-fry for 5-6 minutes until cooked through.

Remove the cooked chicken from the skillet and set aside.

In the same skillet, add another tablespoon of oil and then the chopped zucchini and bell pepper. Stir-fry for 3-4 minutes.

Add the minced garlic and stir for an additional 30 seconds.

Return the chicken to the skillet, add the sauce, and toss everything together. Cook for 1-2 minutes more.

Transfer to a serving platter, garnish with sesame seeds and green onions, and serve.