Season chicken breasts with Italian seasoning, salt, and pepper on both sides.
Heat olive oil in a large skillet over medium-high heat. Add chicken and cook for 6-7 minutes per side until golden brown and cooked through (internal temperature of 165°F). Remove chicken and set aside.
In the same skillet, add minced garlic and sun-dried tomatoes. Sauté for 1 minute until fragrant.
Pour in chicken broth and scrape up any browned bits from the bottom of the pan. Let simmer for 2-3 minutes.
Reduce heat to medium-low and stir in half-and-half and Parmesan cheese. Simmer for 3-4 minutes until sauce begins to thicken, stirring frequently.
Add spinach and cook for 2 minutes until wilted, stirring gently.
Return chicken to the skillet and spoon sauce over the top. Simmer for 2-3 minutes to reheat. Garnish with fresh basil and serve with zucchini noodles or a small portion of whole wheat pasta.