01 - Season the chicken strips with Italian seasoning, salt, and pepper evenly.
02 - Heat olive oil in a large, deep skillet over medium-high heat. Add chicken and cook until golden brown and mostly cooked through, approximately 4-5 minutes. Remove chicken from pan and set aside on 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 any browned bits from the bottom. Bring mixture to a boil, then reduce heat to a simmer.
05 - Return the chicken and any accumulated juices to the pan. Cover and cook for 10-12 minutes, stirring occasionally, until pasta is al dente and most of the liquid is absorbed.
06 - Lower the heat. Stir in heavy cream, spinach, Parmesan, and red pepper flakes. Simmer for 2-3 minutes until sauce thickens and spinach wilts. Adjust seasoning to taste.
07 - Serve hot, garnished with extra Parmesan cheese if desired.