Cook the pasta according to package instructions until al dente, then drain.
In a large skillet, heat oil over medium heat and sauté onion until translucent.
Add minced garlic and chicken, then cook until chicken is no longer pink.
Stir in the shrimp and bell peppers, cooking until the shrimp turn pink and bell peppers soften.
Sprinkle in the Jamaican curry powder and allspice, stirring to coat the ingredients.
Pour in the heavy cream, stirring to combine, and let the mixture simmer.
Add the cooked pasta to the skillet, tossing it with the sauce and ingredients.
Season with salt, pepper, and garnish with fresh cilantro before serving.