Cut chicken breast into 1" pieces and marinate with white pepper, salt, Shaoxing wine, avocado oil, sesame oil, and cornstarch for 30 minutes.
Premix your sauce by combining soy sauce, oyster sauce, white pepper, sugar, msg, chicken stock, and cornstarch. Mix until combined and set aside.
Chop garlic and ginger and set aside, then cut zucchini and mushroom to similar size pieces as the chicken.
In a pot of boiling water, blanch zucchini for 10 seconds and remove and drain thoroughly.
In a hot pan or wok over high heat, heat 1 cup of avocado oil until smoking (about 450F), then carefully drop the chicken in the oil and velvet for 1-2 minutes until pieces are cooked through. Remove and set aside in a bowl.
Reserve 2 tbsp of frying oil, and sauté garlic and ginger for 15 seconds.
Add the mushrooms, then stir fry for 1-2 minutes or until the mushrooms begin to brown, then add back the chicken.
Add the premixed sauce and combine. The sauce will thicken after just a few seconds (refer to video for sauce consistency).
Finally, add back your blanched zucchini and give it a final toss. Finish with a tsp of sesame oil, give it a final mix and serve with freshly steamed rice. Enjoy!
Video
Notes
Cut Chicken and Vegetables into Similar Sizes - Make sure the chicken is cut into similar sizes so it cooks evenly. Substitute with chicken thighs if you prefer. Cut the zucchini and mushrooms into a similar shape/size as the chicken - this allows for the dish to cook evenly, look more cohesive, and allow for better mouthfeel. If you adjust the size of the chicken and vegetables to your preference (smaller or larger), make sure to adjust the cooking time!Don't Skip Blanching the Zucchini! - Blanching your zucchini is a quick and simple way to keep them crisp and delicious! It tenderizes without making it mushy, and eliminates any bitterness. It also helps prevent loss of color.Success is in the Prep - Mushroom Chicken Stir-Fry is one of those recipes that comes together extremely quickly - the key is having your ingredients prepped and in bowls right next to your wok or pan! Have your chicken, broccoli and aromatics, seasoning and pre-mixed sauce ready and easily accessible during the cooking process.Avoid Overcrowding - My KEY TIP would be to avoid crowding your pan - crowding can lead to your Mushroom Chicken Stir-Fry not cooking thoroughly and becoming mushy. If you think your dish will be crowded, use a larger pan, cast iron, or dutch oven, OR cook in batches.Storage - You can store any leftover Mushroom Chicken Stir-Fry in the refrigerator in an airtight container for up to 3 days. Because this dish is not coated in a batter, you won't have to worry about trying to restore the crispy texture of the dish - I recommend reheating this in the microwave or in a hot pan/wok for a couple minutes (add a little bit of water if you want to loosen up the chicken pieces that stuck together in the refrigerator).