Begin by placing the boneless chicken breasts at the bottom of your crockpot, ensuring they are spread out evenly to cook thoroughly.
In a medium-sized mixing bowl, combine the heavy cream, chicken broth, Cajun seasoning, smoked paprika, minced garlic, and a sprinkle of salt and pepper. Whisk together until the mixture is smooth and well blended.
Pour the creamy mixture over the chicken in the crockpot, ensuring all the chicken is coated.
Add the diced bell pepper, chopped onion, and diced tomatoes around and on top of the chicken, distributing them as evenly as possible.
Cover the crockpot with its lid and set it to cook on the low setting for 6 hours, or on high for 3 hours, depending on your schedule.
Approximately 30 minutes before you plan to serve the dish, add the penne pasta directly into the crockpot. Stir gently to incorporate the pasta with the other ingredients.
After 15 minutes, check the pasta for tenderness and stir again. You may need to adjust the cooking time based on your preferences until the pasta reaches the desired texture.
Once the pasta is cooked to perfection, stir in the grated Parmesan cheese, mixing until it melts and creates a creamy sauce.
Taste the dish, adjusting the seasoning with additional salt and pepper if necessary. Serve warm, generously garnished with freshly chopped parsley for a vibrant touch.
Notes
Serve in deep bowls and sprinkle with extra Parmesan for added richness.