Prepare the Chicken: Season both sides of the chicken breasts with Italian seasoning, salt, and pepper. Ensure even coating for optimal flavor infusion.
Sear the Chicken: Heat 2 tablespoons of olive oil in a large skillet over medium heat. Add the chicken and sear each side for 3–4 minutes, or until golden brown. Remove and set aside.
Cook the Aromatics: In the same skillet, add the remaining tablespoon of oil and sauté the onion for 2–3 minutes until softened. Add garlic and sun-dried tomatoes, cooking an additional minute until fragrant.
Incorporate the Spinach: Add the baby spinach to the skillet, cooking just until it begins to wilt, preserving its vibrant color and freshness.
Build the Sauce: Pour in the heavy cream and stir in the Parmesan cheese. Bring the mixture to a gentle simmer, allowing the flavors to meld into a creamy consistency.
Combine and Finish: Return the seared chicken to the skillet, spooning sauce over the breasts. Simmer for approximately 5 minutes, until the chicken is heated through and fully coated in the creamy Tuscan sauce.
