Cook Rigatoni Pasta: Follow package instructions to cook rigatoni until al dente. Drain and set aside.
Brown the Garlic Sausage: In a large skillet, heat olive oil over medium heat. Add crumbled garlic sausage and cook until browned and thoroughly cooked.
Add Minced Garlic: Add minced garlic to the skillet and cook for an additional minute, stirring constantly to avoid burning.
Create the Sauce: Pour in the heavy cream and bring to a simmer. Let it cook for 2-3 minutes until it starts to thicken.
Incorporate Parmesan: Stir in the grated Parmesan cheese until it melts and combines well with the cream sauce.
Season: Add salt and pepper to taste.
Combine with Pasta: Add the cooked rigatoni to the skillet and toss until the pasta is well coated in the creamy Alfredo sauce.
Serve and Garnish: Serve hot, garnished with chopped fresh parsley.