01 - Season both sides of the chicken breasts evenly with salt, pepper, dried oregano, and dried basil.
02 - Heat olive oil in a large skillet over medium-high heat. Sear the chicken breasts for 3 to 4 minutes per side until golden brown. Remove and set aside.
03 - In the same skillet, melt the butter. Sauté the diced onion for 2 minutes until translucent, then add the minced garlic and cook for 30 seconds until fragrant.
04 - Add the halved cherry tomatoes and cook for 3 to 4 minutes, stirring occasionally, until they begin to soften and release their juices.
05 - Pour in the dry white wine and chicken broth, scraping the bottom of the skillet to deglaze. Bring the liquid to a gentle simmer.
06 - Return the seared chicken to the skillet, cover with a lid, and simmer over low heat for 12 to 15 minutes until the chicken is cooked through.
07 - Add the fresh spinach and cook for 2 to 3 minutes until wilted. Adjust seasoning with salt, pepper, and chili flakes if desired.
08 - Serve each chicken breast topped with the tomato-spinach pan sauce alongside your choice of rice, pasta, or crusty bread.