Cook pasta in a large pot of salted boiling water according to package instructions. Drain and set aside.
- Season chicken with salt, pepper, and Italian seasoning.
- In a large skillet, heat olive oil or butter over medium-high heat.
- Sear chicken for 4–5 minutes per side until golden and cooked through. Remove from skillet and let rest.
- In the same skillet, add more oil if needed, then sauté garlic for 1 minute until fragrant.
- Pour in chicken broth and scrape up browned bits from the bottom of the pan.
- Stir in heavy cream and bring to a gentle simmer.
- Reduce heat and add Parmesan cheese, stirring until smooth and slightly thickened.
- Slice the chicken and return to the pan. Add cooked pasta and toss to combine.
- Garnish with fresh parsley and red pepper flakes if desired. Serve warm.