01 - Preheat the oven to 400°F. Position the rack in the center of the oven.
02 - In a large mixing bowl, combine the grated ginger, minced garlic, olive oil, gluten-free soy sauce, honey, rice vinegar, black pepper, and salt. Whisk until well blended.
03 - Pat the chicken thighs dry with paper towels. Add them to the marinade and toss thoroughly to coat each piece evenly. Let rest for 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 over the top.
05 - Bake for 35 to 40 minutes, until the skin is golden brown and the internal temperature reaches 165°F at the thickest part of the thigh. Juices should run clear when pierced.
06 - For extra crispy skin, switch the oven to broil for 2 to 3 minutes, watching carefully to prevent burning.
07 - Remove from the oven and let the chicken rest for 5 minutes. Garnish with sliced green onions and toasted sesame seeds. Serve hot.