Creating the Creamy Italian Sausage Rigatoni is simple with these straightforward steps:

1. Cook the Pasta: Boil a large pot of salted water and cook the rigatoni according to package instructions until al dente. Drain and set aside.
2. Brown the Sausage: In a large skillet over medium heat, add the Italian sausage. Cook until browned and crumbled, about 5-7 minutes. Drain excess fat if necessary.
3. Sauté Aromatics: Add olive oil, onion, and garlic to the skillet with the sausage. Sauté until the onion is translucent, around 3-4 minutes.
4. Create the Sauce: Pour in chicken broth and heavy cream. Stir well to combine, then let it simmer for 5 minutes.
5. Add Cheese and Season: Stir in the grated Parmesan cheese and Italian seasoning. Mix until the cheese melts into the sauce. Season with salt and pepper to taste.
6. Combine Pasta and Sauce: Add the cooked rigatoni to the skillet, tossing gently to coat the pasta in the creamy sauce.
7. Heat Through: Allow the pasta to heat through for a couple of minutes while stirring.
8. Serve: Once heated, transfer the dish to a serving bowl. Garnish with fresh basil if desired.

These steps will guide you in preparing this incredible dish, ensuring that the creamy sauce envelops each piece of rigatoni perfectly.