Season the chicken with salt, pepper, and Italian seasoning.
In a large skillet over medium-high heat, heat olive oil and cook the chicken until browned and cooked through. Remove from skillet and set aside.
In the same skillet, melt butter and sauté the garlic and red pepper flakes until fragrant.
Pour in the chicken broth and bring to a simmer.
Add heavy cream and parmesan cheese. Stir until the cheese is melted and the sauce is smooth.
Return the cooked chicken to the pan and let everything simmer for a few more minutes.
Add cooked rotini and toss until well coated in the sauce.
Garnish with parsley and serve warm.