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