Cook rigatoni pasta in salted boiling water until al dente, then drain.
Heat olive oil in a large skillet over medium heat.
Add Italian sausage and cook until browned and fully cooked.
Add minced garlic and cook for 30 seconds until fragrant.
Stir in crushed tomatoes and marinara sauce.
Add salt, pepper, oregano, and chili flakes.
Simmer sauce for 8–10 minutes on low heat.
Add heavy cream if you want a creamy sauce version.
Mix cooked rigatoni pasta into the sausage sauce.
Sprinkle Parmesan cheese and fresh basil on top.
Serve hot and enjoy this classic Italian comfort meal.