Gather all your ingredients. Slice the chicken into strips, and chop the bell peppers, green beans, garlic, and scallions.
Heat 1 tablespoon of canola oil (or coconut oil) over medium-high heat in a large wok or skillet. Add 2 teaspoons of sesame oil.
Add the sliced chicken to the pan and cook for 5-7 minutes until browned and cooked through. Remove from the pan and set aside.
In the same pan, add minced garlic and chopped bell peppers. Stir-fry for 2 minutes, then add green beans and stir-fry for another 3-4 minutes.
Return the cooked chicken to the pan with vegetables. Pour in chicken stock and teriyaki sauce. Stir to coat and cook for an additional 2 minutes.
Remove from heat and sprinkle with chopped scallions and sesame seeds. Serve immediately over rice or quinoa.