01 - Preheat the oven to 400°F. Position the rack in the center of the oven for even heat distribution.
02 - In a large mixing bowl, combine the grated ginger, minced garlic, olive oil, gluten-free soy sauce, honey, rice vinegar or lemon juice, ground black pepper, and kosher salt. Whisk until thoroughly blended into a uniform marinade.
03 - Pat the chicken thighs dry with paper towels to ensure proper adhesion. Add the thighs to the marinade and toss vigorously, coating each piece on all sides. Allow the chicken to marinate for at least 10 minutes at room temperature, or refrigerate for up to 2 hours for deeper flavor penetration.
04 - Place the marinated chicken thighs in a single layer, skin side up, in a baking dish or on a rimmed sheet pan. Pour any remaining marinade evenly over the top of each piece.
05 - Bake on the center rack for 35 to 40 minutes, until the skin is deeply golden and the internal temperature of the thickest part of each thigh registers 165°F on an instant-read thermometer. Juices should run clear when pierced.
06 - For an extra-crisp skin, switch the oven to the broil setting during the final 2 to 3 minutes of cooking. Watch carefully to prevent burning.
07 - Remove the chicken from the oven and let it rest for 5 minutes to allow the juices to redistribute. Garnish with sliced green onions and toasted sesame seeds. Serve immediately while hot.