Cook the Rigatoni: Begin by bringing a large pot of salted water to a boil. Add the 12 oz rigatoni pasta and cook according to the package instructions until al dente. Drain the pasta and set aside.
Sauté the Garlic Chicken Sausage: In a large skillet, heat 1 tbsp olive oil over medium heat. Add 1 lb garlic chicken sausage, sliced, and sauté until browned and heated through, about 5-7 minutes. Once cooked, remove the sausage from the skillet and set aside.
Sauté the Garlic: In the same skillet, reduce the heat to low and add 2 minced garlic cloves. Sauté for about 30 seconds until fragrant, being careful not to burn the garlic.
Make the Alfredo Sauce: Pour in 1/2 cup chicken broth and 1 cup heavy cream, stirring well to combine. Let the mixture heat through until it starts to simmer gently.
Add the Cheese: Gradually mix in 1 cup grated Parmesan cheese, stirring continuously until the sauce is smooth and creamy. Season with salt and pepper to taste.
Combine Everything: Add the cooked rigatoni pasta and sautéed garlic chicken sausage back into the skillet. Gently toss to coat everything in the velvety Alfredo sauce.
Garnish and Serve: Transfer the creamy rigatoni to plates, garnishing with freshly chopped parsley. Serve immediately and enjoy!