01 - Pat chicken breasts dry with paper towels. Season both sides generously with salt, black pepper, and garlic powder, pressing seasoning into meat to adhere.
02 - Heat olive oil and butter in large skillet over medium-high heat until butter foams. Add chicken breasts and sear 5-6 minutes per side until golden brown and internal temperature reaches 165°F. Transfer to plate and cover loosely with foil.
03 - Return skillet to medium heat. Add minced garlic and sauté 30 seconds until fragrant, being careful not to burn. Stir in chopped sun-dried tomatoes and cook 1 minute.
04 - Pour in chicken broth, using wooden spoon to scrape up browned bits from bottom of pan. Let simmer 1 minute to reduce slightly.
05 - Reduce heat to medium-low. Pour in heavy cream, add Parmesan cheese and Italian seasoning. Stir constantly until cheese melts and sauce thickens slightly, 2-3 minutes.
06 - Add fresh spinach to sauce, tossing gently with tongs until wilted, about 1 minute.
07 - Return chicken breasts to skillet, spooning sauce generously over each piece. Simmer 3-4 minutes until chicken is heated through. Serve immediately garnished with fresh basil and additional Parmesan if desired.