In a large pot set over medium-high heat, cook the oil from the sun-dried tomato jar with the chicken and 2 teaspoons of Italian seasoning. Cook for 5 minutes until the chicken is cooked through. Scoop the chicken out of the pot and set aside.
Add the butter, garlic, and 2 teaspoons of Italian seasoning. Cook until fragrant, about 2 minutes. Add the pasta and 2 cups of water. Cook, stirring often, until the pasta is al dente, about 8 minutes. Stir in the milk, cream cheese, and parmesan. Mix until creamy.
Slide the chicken into the pasta, add the spinach, sun-dried tomatoes, and parmesan, and gently mix. Remove from the heat and stir in the basil.
Serve the pasta immediately with fresh parmesan and basil. Enjoy!