Cut the chicken thighs into bite-sized pieces.
Mix soy sauce, minced garlic, sugar, and cooking wine to make the marinade.
Add the marinade to the chicken thighs and let them sit for 10 minutes.
Heat cooking oil in a pan and cook the chicken thighs over medium heat.
When the chicken is cooked, add onion and spicy green chili pepper, then stir-fry together.
Finish by adding sesame oil and sprinkling sesame seeds on top.