01 - In a large bowl, combine chicken pieces with 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 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 darkened slightly, taking care not to burn it.
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 about 3 minutes until the vegetables soften and become fragrant.
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 tender, and the sauce has thickened to a rich consistency. Adjust salt and pepper to taste.
07 - Remove from heat and garnish with additional chopped scallion or fresh thyme if desired. Serve hot alongside steamed white rice, Jamaican rice and peas, or fried plantains.