In a medium bowl, combine the marinade ingredients, mixing them well. Add the sliced chicken breast, ensuring each piece is well coated. Cover the bowl and refrigerate for at least 30 minutes.

While the chicken marinates, prepare the sauce in a small bowl by mixing all the sauce ingredients together until smooth. Set aside.

Heat a wok or large skillet over medium-high heat and add oil. Once hot, add the marinated chicken and sear for 4-5 minutes until golden brown.

In the same pan, add sliced mushrooms and zucchini. Stir-fry for 2-3 minutes until tender-crisp and vibrant.

Return the seared chicken to the pan, pour the prepared sauce over, and stir to coat. Cook for 1-2 minutes until the sauce thickens.

Remove from heat and serve hot, garnished with sesame seeds. Pair with steamed jasmine rice or fried rice.