Creating Creamy Italian Sausage Rigatoni is straightforward with these steps:

1. Boil Pasta: In a large pot, bring salted water to a boil. Add rigatoni and cook according to package instructions until al dente. Drain and set aside.
2. Cook Sausage: In a large skillet over medium heat, add olive oil. Once heated, add the Italian sausage, breaking it up with a spatula. Cook until browned and cooked through, about 5-7 minutes.
3. Add Aromatics: Mix in the chopped onion and minced garlic. Cook until the onion becomes translucent, about 2-3 minutes.
4. Make the Sauce: Pour in the heavy cream, stirring to combine. Add the grated Parmesan cheese, Italian seasoning, and crushed red pepper flakes (if using).
5. Season: Allow the sauce to simmer for 5 minutes, stirring occasionally. Season with salt and pepper to taste.
6. Combine: Add the drained rigatoni to the skillet, tossing well to coat the pasta in the creamy sauce.
7. Garnish: Remove from heat and garnish with fresh basil or parsley before serving.

Following these steps will lead to an incredibly delightful dish that your loved ones will crave!