Pat chicken breasts dry with paper towels and season both sides generously with salt, pepper, and garlic powder. Heat olive oil in a large skillet over medium-high heat until it shimmers and just begins smoking slightly.

Place seasoned chicken in the hot skillet and sear for exactly 6–7 minutes per side without moving them, until golden-brown crust forms. The chicken won't be fully cooked yet; this step develops flavor and texture that defines elegant chicken dishes.

Transfer seared chicken to a clean plate and reduce heat to medium. Add diced onion to the same skillet with butter, stirring constantly for 2 minutes until onion softens and becomes translucent.

Stir in minced garlic and dried Italian seasoning, cooking for exactly 45 seconds—this prevents garlic from burning and releases its aromatic oils. Add chicken broth and scrape the bottom of the pan with a wooden spoon to release all browned bits.

Return chicken to the skillet, nestling it into the liquid, and simmer covered for 8 minutes until it reaches 165°F internal temperature. This creamy spinach chicken elegant recipe builds its signature sauce during this crucial resting period.

Remove the lid and stir in heavy cream and grated Parmesan cheese until the sauce coats the back of a spoon. Add fresh spinach in large handfuls, stirring gently until it wilts completely—approximately 90 seconds total.

Finish by squeezing lemon juice over the dish and tasting for seasoning adjustments. Add red pepper flakes for subtle heat if desired, and let it rest off heat for 2 minutes before serving.