01 - Preheat oven to 400°F (200°C). Position the rack in the center.
02 - Pat the chicken breasts dry with paper towels. Season both sides evenly with salt, pepper, and dried Italian herbs.
03 - Heat olive oil in a large oven-proof skillet over medium-high heat. Sear chicken breasts for 2–3 minutes per side until a golden crust forms. Remove and set aside; they will finish cooking in the oven.
04 - Reduce heat to medium. Melt the butter in the same skillet, then add minced garlic and cook for about 30 seconds until fragrant.
05 - Add the fresh baby spinach to the skillet and sauté, tossing gently, until just wilted — about 2 minutes.
06 - Pour in the heavy cream, lemon juice, and lemon zest. Stir to combine and bring the mixture to a brief simmer.
07 - Sprinkle in the grated Parmesan cheese and stir continuously until melted and the sauce thickens slightly.
08 - Return the seared chicken breasts to the skillet, nestling them into the spinach cream sauce. Spoon sauce over the top. Transfer the skillet to the oven and bake for 12–15 minutes, until the chicken reaches an internal temperature of 165°F (74°C).
09 - Serve hot, garnished with extra lemon zest or shaved Parmesan if desired. Pairs well with roasted potatoes, a green salad, or a crisp Sauvignon Blanc.