01 - Cook pasta according to package directions until al dente. Drain, reserving 1/2 cup of pasta water, and set aside.
02 - Season both sides of chicken breasts with salt and black pepper.
03 - Heat olive oil in a large skillet over medium-high heat. Add chicken breasts and cook 5 to 7 minutes per side until golden brown and fully cooked. Remove from skillet, let rest for 3 minutes, then slice thinly.
04 - Reduce heat to medium. Add butter and minced garlic to the same skillet and sauté for 1 minute until fragrant.
05 - Pour in heavy cream and chicken broth; stir to combine. Bring to a gentle simmer.
06 - Stir in grated parmesan, Italian seasoning, and optional red pepper flakes. Simmer for 2 to 3 minutes until sauce thickens slightly.
07 - Add cooked pasta to the skillet and toss to coat thoroughly. If sauce is too thick, gradually add reserved pasta water to desired consistency.
08 - Return sliced chicken to the skillet and gently toss to mix and heat through.
09 - Taste and adjust seasoning with additional salt and pepper as needed.
10 - Plate immediately, garnished with chopped fresh parsley and extra grated parmesan cheese.