Cook 10 oz rigatoni according to the box instructions. Drain, then set aside.
In your skillet add the 2 tbsp olive oil and 2 cloves minced garlic and saute for 1-2 minutes or until fragrant.
Add 1/2 cup sun-dried tomatoes, 2 tbsp tomato paste, 1 cup chicken broth, and 1 cup heavy whipping cream. Stir to combine.
Add the 1 tsp Italian seasoning, 1/2 tsp parsley, 1/2 tsp salt and red chili flakes to taste. Stir to combine again.
In a small, separate bowl, combine 1 tablespoon of the reserved flour mixture with 3 tablespoons of the sauce mixture from the pan. Stir until a paste is formed, then add that paste back into the saucepan along with ½ cup of parmesan cheese. Stir until the sauce thickens up.
Add the cooked rigatoni into the pan and stir for 1 minute or until everything is warm.
Add the chicken back into the skillet and top with the remaining ½ cup of parmesan. Mix to combine and allow it to cook, uncovered, for another few minutes until fully thickened into a sauce.
Serve and enjoy!