01 - Preheat oven to 400°F. Pat chicken breasts dry and season both sides generously with salt, pepper, and Italian herbs.
02 - Heat olive oil in a large oven-proof skillet over medium-high heat. Sear chicken breasts for 2-3 minutes per side until golden brown. Remove chicken and set aside on a plate.
03 - Reduce heat to medium. In the same skillet, melt butter and add minced garlic. Sauté for 30 seconds until fragrant, taking care not to burn.
04 - Add fresh spinach to the skillet and sauté for about 2 minutes until just wilted.
05 - Stir heavy cream, lemon juice, and lemon zest into the skillet. Bring to a brief simmer, then sprinkle in Parmesan cheese. Stir constantly until melted and sauce slightly thickens.
06 - Return chicken breasts to the skillet, nestling them into the spinach sauce. Spoon sauce over the top of the chicken. Transfer skillet to oven and bake for 12-15 minutes until chicken reaches an internal temperature of 165°F.
07 - Remove from oven. Serve hot, optionally garnished with extra lemon zest or shaved Parmesan.