Prepare the Jerk Seasoning: In a small bowl, combine brown sugar, paprika, thyme, garlic powder, onion powder, allspice, cayenne pepper, black pepper, salt, cinnamon, and nutmeg. Mix well and set aside.
Season the Chicken: Cut chicken breasts into strips and coat thoroughly with the jerk seasoning mixture. Let marinate for at least 15 minutes, or up to 2 hours for more intense flavor.
Cook the Pasta: Bring a large pot of salted water to boil. Cook pasta according to package directions until al dente. Reserve 1/2 cup pasta water before draining.
Cook the Chicken: Heat olive oil in a large skillet over medium-high heat. Add seasoned chicken strips and cook for 5-7 minutes until golden brown and cooked through. Remove chicken and set aside.
Sauté the Vegetables: In the same skillet, add onion and bell peppers. Cook for 4-5 minutes until softened. Add minced garlic and cook for another minute until fragrant.
Create the Sauce: Stir in tomato paste and cook for 1 minute. Add coconut milk, heavy cream, and chicken broth. Simmer for 3-4 minutes until sauce begins to thicken.
Combine Everything: Return chicken to the skillet and add drained pasta. Toss everything together, adding reserved pasta water if needed to achieve desired consistency.
Final Touches: Remove from heat and stir in chopped green onions. Taste and adjust seasoning with salt and pepper as needed.
Serve: Garnish with fresh parsley and serve immediately while hot.