In a large skillet, heat the vegetable oil over medium heat. Add the chopped onion and sauté for about 3 minutes until translucent.
Stir in the minced garlic and grated ginger, cooking for an additional minute until fragrant.
Add the chopped bell pepper to the skillet and cook for another 2-3 minutes until softened.
Sprinkle in the Jamaican curry powder, allspice, and thyme, stirring well to coat the vegetables. Cook for 1 minute to toast the spices.
Pour in the coconut milk and chicken broth, stirring to combine. Bring the mixture to a gentle simmer.
Add the shrimp to the skillet and cook for 5-7 minutes, or until the shrimp are pink and cooked through.
Stir in the soy sauce and season with salt and pepper to taste.
Remove from heat and garnish with sliced green onions. Serve over cooked rice.