Marinate the chicken: Make a few slits on the thicker parts of the chicken thighs (for easier cooking). Mix together the marinade for the chicken, give it a massage for better absorption, and marinate for at least 30 minutes.
Cook the chicken: In a frying pan, heat some oil over medium heat. Transfer the marinated chicken to the pan with the skin side down, and pan sear both sides until golden-brown (about 4-5 minutes per side). Do not flip the chicken for the first 1-2 minutes to lock in the moisture.
Rest the chicken: Once the chicken thighs are cooked, remove them from the pan, and let rest in the chopping board for 5 minutes to avoid losing the juices. Cut the chicken into slices. Meanwhile, prepare the scallion oil.
Make the scallion oil: In a bowl, combine chopped scallions, minced garlic, sesame seeds, sugar, salt, and oil. Give it a mix.
Combine: Place the sliced chicken back to the pan over medium heat, and drizzle the scallion oil over the chicken. Cover with a lid, and cook for another 1 minute.
Assemble the bowl: Scoop steamed white rice into a bowl, and layer the scallion oil chicken on top. Enjoy!