Cut the chicken tenders into bite-sized pieces.
Slice the onion and green onion diagonally.
Make a sauce by mixing soy sauce, sugar, minced garlic, sesame oil, and pepper.
Heat some cooking oil in a pan and stir-fry the chicken tenders.
Once the chicken is cooked, add the onion and green onion and stir-fry together.
Add the sauce and stir well to combine.
When all the ingredients are fully cooked, turn off the heat.
Transfer to a plate and sprinkle with sesame seeds to finish.