Cut the chicken tenderloin into bite-sized pieces.
Slice the onion and green onion into easy-to-eat pieces.
Heat cooking oil in a pan and stir-fry the chicken tenderloin.
When the chicken is halfway cooked, add the onion and green onion and stir-fry.
Add soy sauce, minced garlic, cooking wine, and black pepper and stir-fry.
When all ingredients are well cooked, add sesame oil to finish.