01 - Pat chicken breasts dry with paper towels. Season both sides generously with salt, black pepper, and garlic powder, ensuring even coverage.
02 - Heat olive oil and butter in a large skillet over medium-high heat until shimmering. Add chicken breasts and sear for 5-6 minutes per side until golden brown and internal temperature reaches 165°F. Transfer to a plate and tent loosely with foil.
03 - Reduce heat to medium. Add minced garlic to the skillet and sauté for 30 seconds until fragrant, being careful not to burn. Stir in chopped sun-dried tomatoes and cook for 1 minute to meld flavors.
04 - Pour in chicken broth, using a wooden spoon to scrape up any browned bits from the bottom of the pan. Let simmer for 1 minute to reduce slightly.
05 - Reduce heat to medium-low. Stir in heavy cream, Parmesan cheese, and Italian seasoning. Cook for 2-3 minutes, stirring constantly, until sauce is smooth and slightly thickened.
06 - Add fresh spinach to the sauce, tossing gently to coat. Let cook for about 1 minute until just wilted but still vibrant green.
07 - Return chicken breasts to the skillet, spooning sauce generously over the top. Simmer for 3-4 minutes until chicken is heated through. Serve immediately, garnished with chopped fresh basil and additional Parmesan if desired.