01 - Bring a large pot of generously salted water to a rolling boil. Add the pasta and cook according to package directions until al dente. Drain, reserving ½ cup of the starchy pasta water, and set aside.
02 - While the pasta cooks, pat the chicken breasts dry with paper towels. Season both sides evenly with salt, freshly ground black pepper, and Italian seasoning.
03 - Heat the olive oil in a large skillet over medium-high heat until shimmering. Add the seasoned chicken breasts and cook for 5 to 6 minutes per side, until golden brown and the internal temperature reaches 165°F. Transfer to a plate and let rest for 5 minutes before slicing thinly against the grain.
04 - Reduce the heat to medium in the same skillet. Melt the butter, then add the minced garlic. Sauté for about 1 minute until fragrant, being careful not to let it brown.
05 - Stir in the sliced sun-dried tomatoes and cook for 1 minute. Pour in the chicken broth and bring to a gentle simmer, using a wooden spoon to scrape up any browned bits from the bottom of the pan.
06 - Stir in the heavy cream and grated Parmesan cheese. Simmer for 2 to 3 minutes, stirring frequently, until the sauce coats the back of a spoon. Add the crushed red pepper flakes if desired.
07 - Return the sliced chicken to the skillet along with the drained pasta. Toss everything together until evenly coated in the creamy sauce. If the sauce is too thick, loosen it with a splash of the reserved pasta water. Taste and adjust seasoning with salt and pepper as needed. Serve hot, garnished with fresh basil and additional Parmesan cheese.