Spiralize the zucchini into noodles. Place them in a strainer, sprinkle with salt, toss gently, and let sit for 5 minutes to release moisture.
In a bowl, combine chicken, oyster sauce, rice vinegar, and black pepper. Marinate for 10 minutes.
Mix all sauce ingredients in a small bowl and set aside.
Pat the zucchini noodles dry thoroughly using paper towels. Do not rinse.
Heat 1 tablespoon oil in a large skillet over medium-high heat. Cook chicken until fully done, about 6 minutes. Remove and set aside.
Add remaining oil to the skillet. Sauté garlic, ginger, chili, and green onions for about 1 minute until fragrant.
Stir the sauce again and pour into the pan. Bring to a simmer.
Add zucchini noodles and toss until evenly coated.
Return chicken to the pan, toss everything together once more, and garnish with sesame seeds.
Serve immediately and enjoy this Chicken Zoodle Stir Fry recipe.