1. Heat oil in a cast iron skillet over medium heat.
2. Season the chicken breasts with Italian seasoning, salt and pepper then place in the hot skillet.
3. Sear the chicken for 4-5 minutes on one side, then flip and continue to cook for 4-5 more minutes.
4. Add the chicken broth to the skillet and increase heat to medium-high.
5. Once the chicken broth is simmering, add the heavy whipping cream and then reduce heat to medium.
6. Allow the liquid to simmer until reduced by half, about 8 minutes.
7. Add the spinach and sundried tomatoes to the skillet until spinach is completely wilted.
8. Add the Parmesan cheese to taste, then finish off with the lemon juice.