First, prepare the sauce. Heat a small saucepan over medium heat then add the olive oil and sesame oil. Add the garlic and ginger and saute for 30 to 1 minute then add the sugar. Cook sugar for 2 minutes until melted. Stir in the soy sauce, mirin, sake let boil slowly and stir. Lower the heat and simmer for 10 to 15 minutes until thick.
Season chicken with salt and pepper.
Preheat oven to 425 degrees F.
Heat a cast iron pan to medium heat. Add a splash of olive oil then sear the chicken on all side about 10 minutes. Transfer the chicken to the oven and bake for 20 minutes. Pour sauce over chicken and garnish with green onions. Enjoy!
Recipe by The Gluten Free at https://www.theglutenfree.com/gluten-free-chicken-teriyaki/