1. Begin by seasoning the chicken breasts with Cajun seasoning, ensuring they are well-coated for maximum flavor.
2. In a large skillet, heat the olive oil over medium-high heat. Add the chicken breasts and cook for about 6-7 minutes on each side until browned and cooked through. Remove from the skillet and set aside.
3. In the same skillet, add the sliced bell peppers and minced garlic. Sauté for 3-4 minutes until the peppers are tender and the garlic is fragrant.
4. Pour in the heavy cream and chicken broth, stirring to combine. Bring the mixture to a simmer, then reduce the heat to low.
5. Add the Parmesan cheese, stirring until melted and the sauce is smooth and creamy. Season with salt and pepper to taste.
6. Meanwhile, cook the penne pasta according to package instructions. Drain and add the pasta to the skillet, tossing to coat in the creamy sauce.
7. Slice the cooked chicken and return it to the skillet, mixing with the pasta and sauce. Allow everything to heat through for a minute or two.
8. Garnish with chopped parsley before serving for a fresh pop of color and flavor.

Cooking is about intuition as much as instruction, so feel free to adjust the seasoning and ingredients to your liking. Remember, the kitchen is your canvas!