01 - Coat chicken strips evenly with Italian seasoning, salt, and black pepper.
02 - Heat olive oil in a large, deep skillet over medium-high heat. Add chicken and cook until golden brown and mostly cooked through, about 4 to 5 minutes. Transfer chicken to a plate.
03 - In the same pan, add garlic and sun-dried tomatoes. Sauté for 1 minute until fragrant.
04 - Add uncooked pasta and chicken broth to the pan. Stir well, scraping up any browned bits from the bottom. Bring to a boil, then reduce heat to a simmer.
05 - Return chicken and any accumulated juices to the pan. Cover and cook for 10 to 12 minutes, stirring occasionally, until pasta is al dente and most liquid is absorbed.
06 - Reduce heat. Stir in heavy cream, spinach, Parmesan, and red pepper flakes. Simmer for 2 to 3 minutes until sauce thickens and spinach wilts. Adjust seasoning to taste.
07 - Serve hot, garnished with extra Parmesan if desired.