01 - In a large bowl, combine the chicken pieces with the curry powder, salt, black pepper, minced garlic, grated ginger, thyme sprigs, chopped Scotch bonnet pepper, and lime juice. Mix thoroughly to coat evenly, cover, and refrigerate for at least 1 hour or overnight for deeper flavor penetration.
02 - Heat the 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 to prevent burning, until deeply fragrant.
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.
04 - Add the sliced onion, chopped scallions, and chopped bell pepper to the pot. Sauté for 3 minutes until the vegetables begin to soften.
05 - Pour in the reserved marinade liquid and chicken broth. Add the diced potatoes, thyme, and allspice berries if using. Stir well to combine, bring to a simmer, then reduce the heat to low and cover the pot.
06 - Cook covered for 30 to 35 minutes, stirring occasionally, until the chicken is fully cooked through, the potatoes are tender, and the sauce has thickened. Adjust salt and pepper to taste.
07 - Remove from heat and garnish with additional scallion or fresh thyme if desired. Serve hot alongside steamed white rice, Jamaican rice and peas, or fried plantains.