01 - In a large bowl, combine the chicken pieces with 1 tablespoon Jamaican curry powder, salt, black pepper, minced garlic, grated ginger, thyme sprigs, chopped Scotch bonnet pepper, and lime juice. Mix thoroughly to coat all pieces evenly. Cover and refrigerate for at least 1 hour, or overnight for more developed flavor.
02 - Heat vegetable oil in a large Dutch oven or deep skillet over medium heat. Add 2 tablespoons of Jamaican curry powder and toast for 1 to 2 minutes, stirring constantly, until fragrant and deepened in color. Watch carefully to prevent scorching.
03 - Add the marinated chicken pieces to the pot, reserving any leftover marinade liquid. Sear the chicken until lightly browned on all sides, approximately 5 minutes, turning pieces as needed for even browning.
04 - Add the sliced onion, chopped scallions, and bell pepper to the pot. Sauté for about 3 minutes until the vegetables begin to soften and release their fragrance.
05 - Pour in the reserved marinade liquid and chicken broth. Add the diced potatoes, thyme sprigs, and allspice berries if using. Stir everything together well, bring to a simmer, then reduce heat to low and cover with a lid.
06 - Cook covered for 30 to 35 minutes, stirring occasionally, until the chicken is fully cooked through, the potatoes are fork-tender, and the sauce has thickened to a rich gravy consistency. Season with additional salt and pepper to taste.
07 - Remove from heat and let rest briefly. Garnish with additional chopped scallion or fresh thyme if desired. Serve hot alongside steamed white rice, Jamaican rice and peas, or fried plantains.