Prep your ingredients: Slice the sausage, chop the onion and pepper, and mince the garlic.
Measure out the broth, cream, and spices.
Sauté the aromatics (optional but worth it): In a large pot or deep skillet, heat oil over medium. Add sausage and cook 3–4 minutes to brown slightly. Stir in onion and bell pepper; cook 2–3 minutes until softened.
Add garlic and cook 30 seconds until fragrant.
Dump the base ingredients: Add dry pasta, diced tomatoes with juices, chicken broth, Cajun seasoning, and paprika. Stir well to submerge the pasta.
Simmer: Bring to a boil, then reduce to a gentle simmer. Cover and cook 10–12 minutes, stirring once or twice, until pasta is just al dente.
If the pot looks dry, add a splash of broth or water.
Make it creamy: Stir in heavy cream and Parmesan. Simmer uncovered 2–3 minutes, stirring, until the sauce thickens and clings to the pasta.
Season and finish: Taste and add salt, pepper, and more Cajun seasoning if needed. For extra heat, sprinkle in red pepper flakes or a dash of hot sauce.
Garnish and serve: Top with chopped parsley or green onions and a final dusting of Parmesan.
Serve hot.