In a medium bowl, whisk together lemon juice, roasted garlic, honey, Dijon mustard, parsley, salt, cumin, and turmeric. Add the chicken thighs and coat them thoroughly with the marinade. Cover and refrigerate for at least 30 minutes, or overnight for maximum flavor.
Heat olive oil in an oven-proof skillet over medium heat. Add the diced onion and sauté until soft and translucent. Stir in the rice and toast lightly for about a minute to give it a slightly nutty flavor. Pour in the chicken stock, stirring to combine.
Nestle the marinated chicken thighs on top of the rice mixture. Place thin lemon slices over the chicken and cover the skillet with foil or a tight lid. Bake in a preheated oven at 375°F (190°C) for about 35–40 minutes, until the rice has absorbed the liquid and the chicken is fully cooked. Remove the cover for the last 5–10 minutes to let the top brown slightly.
Once done, let the dish rest for a few minutes to allow the rice to set. Sprinkle with fresh mint and serve directly from the skillet for that rustic, cozy presentation.