Heat oil in large skillet on medium heat. Add onion and cook until caramelized, about 4-5 minutes. Add chicken and sesame oil to cook for another 5 minutes, tossing constantly.
Add coconut aminos, red bell pepper, snow peas, zucchini, and cashews to cook an additional 5-7 minutes. Season with salt and pepper, give it a toss, and it's ready to serve! Enjoy!