First, cut 1.5 lbs of boneless chicken breasts into thin strips.
1.5 lbs boneless chicken breasts
Second, marinate them in a bowl with Tamari and arrowroot powder for at least 15 minutes and up to overnight.
3 tbsp Tamari, 6 tbsp arrowroot powder
Third, in a wok or a large skillet, add sesame oil on medium high heat.
1 tbsp sesame oil
Then, add the chicken and marinate. Stir fry until chicken turns a white, opaque color.
Fourth, add red onion and red bell pepper. Stir fry for about 4 minutes.
1 large red onion, 1 large red bell pepper
Then, add green beans. Add chicken stock (or broth) and turn heat up to high. Continue to stir fry until chicken and vegetables are lightly browned and crisping on the edges.
1 bunch green beans, 3/4 cup chicken stock
Finally, add black Chinese vinegar, salt and pepper to taste, and diced green onions. Stir to combine.
2 tbsp black Chinese vinegar, salt, ground pepper, 6 green onions