Take out mixing bowl and thoroughly mix: Gochujang (4 Tablespoons), Gochugaru (2 Tablespoons), Soy Sauce (2 Tablespoons), Mirim (2 Tablespoons), Sugar (3 Tablespoons), Minced Garlic (1 Tablespoon)
Take out a bowl or plate. Rub the gochujang marinade onto both sides of the chicken thigh. Then let it sit in the refrigerator for at least 30 minutes (longer the better)
Take out a frying pan and place on medium heat. Place some oil into the pan. Once the pan is hot, reduce heat to a LOW (this is important!). Then place each chicken piece skin-side down first. Cover with a lid and let it cook for 3-5 minutes.
After 3-5 minutes, flip the chicken. Then put the lid back on. After another 3-5 minutes, check on the chicken. It should be done by now.
Let it rest for a few minutes. Then cut into thin strips and garnish with chives. Serve with a bowl of rice!