Cook the penne pasta according to package instructions.
In a large skillet, heat olive oil over medium-high heat.
Add diced chicken breasts and cook until browned.
Stir in sliced sausage and cook for an additional 3-4 minutes.
Add the diced onion, bell pepper, and garlic, sauté for 3-5 minutes.
Sprinkle in the Cajun seasoning and stir well.
Pour in chicken broth and heavy cream, stirring to combine.
Introduce the cooked penne pasta, stirring to coat thoroughly.
Let the mixture simmer for 5-7 minutes to thicken.
Season with salt and pepper to taste, garnish with parsley, and serve.