Add Cajun seasoning, diced tomatoes, chicken broth, and heavy cream; stir to combine.
Bring the mixture to a gentle simmer, then add the penne pasta, stirring to combine.
Allow pasta to cook until tender, stirring occasionally.
Season with salt and pepper to taste before serving hot, garnished with chopped parsley.
Notes
Serve in shallow bowls paired with garlic bread and a simple green salad. Leftovers can be stored in an airtight container in the refrigerator for up to 3 days.