Collect all the necessary ingredients. You'll need chicken breasts, pasta (such as penne or fettuccine), sun-dried tomatoes, garlic, spinach, heavy cream, Parmesan cheese, olive oil, salt, pepper, and Italian seasoning.
Bring a large pot of salted water to a boil. Cook the pasta according to the package instructions until it is al dente. Drain the pasta and set it aside, reserving about 1 cup of pasta water.
Season the chicken breasts with salt, pepper, and Italian seasoning. In a large skillet, heat olive oil over medium-high heat. Add the chicken breasts to the skillet and cook until they are golden brown on both sides and cooked through, about 6-7 minutes per side. Once cooked, remove the chicken from the skillet and set it aside.
In the same skillet, add a bit more olive oil if needed. Add minced garlic and sun-dried tomatoes to the skillet. Sauté for 1-2 minutes until the garlic is fragrant and the tomatoes have softened slightly.
Add the spinach to the skillet and cook until it wilts, stirring frequently. Pour in the heavy cream and bring the mixture to a simmer. Allow it to cook for a few minutes until the sauce thickens slightly.
Add the cooked pasta to the skillet with the sauce. Toss everything together until the pasta is well coated with the creamy sauce. If the sauce is too thick, you can add some of the reserved pasta water to loosen it up.
Slice the cooked chicken breasts into thin strips. Add the sliced chicken back to the skillet with the pasta and sauce. Stir gently to combine everything.
Once everything is heated through, remove the skillet from the heat. Serve the Creamy Tuscan Chicken and Pasta hot, garnished with grated Parmesan cheese and fresh chopped parsley, if desired. Enjoy your delicious meal!