01 - Bring a large pot of salted water to a boil. Cook pasta according to package directions until al dente. Reserve 1/2 cup of the pasta water, then drain and set aside.
02 - While the pasta is cooking, season the chicken breasts evenly with salt, pepper, Italian seasoning, and garlic powder.
03 - Heat the olive oil in a large skillet over medium-high heat. Add the seasoned chicken breasts and cook for 5–6 minutes per side, or until golden brown and cooked through with an internal temperature of 165°F (74°C). Remove the chicken from the skillet, let it rest for 5 minutes, then slice into strips.
04 - In the same skillet, melt 3 tablespoons of unsalted butter over medium heat. Add the minced garlic and sauté for 1 minute until fragrant.
05 - Add the sliced sun-dried tomatoes to the skillet and cook for an additional 2 minutes. Pour in the heavy cream, chicken broth, grated Parmesan cheese, and crushed red pepper flakes. Bring the sauce to a simmer and cook for 3–4 minutes, or until slightly thickened.
06 - Return the sliced chicken to the skillet with the sauce. Add the cooked pasta and toss gently to coat everything evenly. If the sauce appears too thick, add the reserved pasta water, 1–2 tablespoons at a time, until the desired consistency is reached.
07 - Stir in the chopped fresh basil. Taste and adjust the seasoning as needed.
08 - In a small saucepan, melt the 4 tablespoons of unsalted butter over medium heat. Swirl the pan occasionally. Continue to cook until the butter foams, turns a rich golden brown color, and develops a nutty aroma, which should take approximately 3–4 minutes. Remove from heat immediately to prevent burning.
09 - Drizzle the prepared brown butter over the plated chicken pasta. Garnish with extra fresh basil and a second sprinkle of Parmesan cheese, if desired.