1. Prepare and Cook the Pasta:
* Bring a large pot of salted water to a rolling boil.
* Add the penne pasta (or your pasta of choice) and 1 tablespoon of olive oil (this helps prevent sticking).
* Cook according to package directions until al dente (tender but still firm to the bite).
* Before draining, reserve about 1 cup of the starchy pasta water. This is liquid gold for adjusting your sauce consistency later.
* Drain the pasta and set aside. You can toss it with a tiny bit of olive oil to prevent it from clumping if it will sit for a while.

2. Prepare and Cook the Chicken (If Using):
* Pat the chicken pieces dry with a paper towel.
* In a medium bowl, toss the chicken pieces with 1-2 tablespoons of jerk seasoning, salt, and pepper until well coated.
* Heat 1 tablespoon of olive oil in a large skillet or Dutch oven over medium-high heat.
* Once the oil is shimmering, add the seasoned chicken to the skillet in a single layer (you may need to do this in batches to avoid overcrowding the pan).
* Cook for 5-7 minutes, turning occasionally, until the chicken is golden brown and cooked through.
* Remove the cooked chicken from the skillet and set aside on a clean plate. Do not wipe out the skillet; the browned bits add flavour to the sauce.

3. Sauté the Aromatics and Vegetables:
* To the same skillet (add a touch more olive oil if needed), add the sliced onion. Sauté over medium heat for 3-4 minutes until softened and translucent.
* Add the minced garlic and cook for another minute until fragrant, being careful not to burn it.
* Add the sliced red, yellow, and green bell peppers to the skillet. Cook for 5-7 minutes, stirring occasionally, until they are tender-crisp. You still want them to have a slight bite and retain their vibrant colour.

4. Build the Creamy Jerk Sauce:
* Sprinkle the sautéed vegetables with 1-2 teaspoons of jerk seasoning, dried thyme, and allspice (if using). Stir well and cook for 1-2 minutes to toast the spices and allow their flavours to bloom.
* Pour in the heavy cream (or coconut milk) and chicken broth (or reserved pasta water). Stir everything together to combine.
* Bring the sauce to a gentle simmer, then reduce the heat to low. Let it simmer for 3-5 minutes, stirring occasionally, allowing the sauce to thicken slightly.
* Stir in the grated Parmesan cheese until it’s melted and the sauce is smooth and creamy.

5. Combine and Finish the Dish:
* Return the cooked chicken (if using) to the skillet with the sauce. Stir to coat the chicken.
* Add the cooked pasta to the skillet. Toss everything gently but thoroughly to ensure every piece of pasta and chicken is well-coated with the creamy jerk sauce.
* If the sauce seems too thick, add a splash of the reserved pasta water to reach your desired consistency.
* Taste the Rasta Pasta and adjust seasonings as needed. You might want to add more salt, black pepper, or even a pinch more jerk seasoning for extra kick.

6. Serve:
* Divide the Creamy Rasta Pasta among serving bowls or plates.
* Garnish generously with fresh chopped parsley or cilantro and an extra sprinkle of Parmesan cheese, if desired.
* Serve immediately with lime wedges on the side for a fresh citrusy zing.

Enjoy your homemade, vibrant, and incredibly delicious Creamy Rasta Pasta!