01 - Combine green onions, garlic, Scotch bonnet pepper, fresh thyme, ground allspice, ground cinnamon, ground ginger, brown sugar, soy sauce, lime juice, salt, and black pepper in a blender or food processor. Blend until mixture becomes smooth.
02 - Coat chicken thighs thoroughly with jerk marinade, ensuring even coverage. Allow to marinate for at least 30 minutes or refrigerate overnight for enhanced flavor.
03 - Set oven to 400°F (200°C) in preparation for roasting.
04 - Heat vegetable oil in a large oven-safe skillet over medium-high heat. Place chicken thighs skin-side down and sear for 3 to 4 minutes until golden. Flip and sear the reverse side for 2 minutes.
05 - Transfer skillet with seared chicken thighs to oven. Bake for 25 to 30 minutes until cooked through and juices run clear, with an internal temperature of 165°F (74°C).
06 - While chicken roasts, rinse long-grain rice under cold running water until the water is clear.
07 - Place rinsed rice, water, and salt into a medium saucepan. Bring to a boil, cover, lower heat, and simmer for 15 minutes until water is absorbed and rice becomes tender.
08 - Remove the saucepan from heat and let sit covered for 5 minutes. Fluff rice gently with a fork.
09 - Carefully fold diced mango, chopped red bell pepper, fresh cilantro, and lime juice into the fluffed rice.
10 - Arrange jerk chicken on plates and serve hot alongside mango rice.