Cut the chicken and onion into bite-sized pieces.
Heat some cooking oil in a pan and stir-fry the chicken and onion.
When the chicken is cooked through, add the fire chicken sauce and stir-fry well.
Add rice, and stir-fry until the ingredients and sauce are evenly mixed.
Place mozzarella cheese on top, cover with a lid, and cook on low heat until the cheese melts.
Transfer to a bowl and garnish with green onion and sesame seeds to finish.