01 - Pat the chicken breasts dry with paper towels. Season both sides generously with salt, freshly ground black pepper, dried oregano, and dried basil.
02 - Heat olive oil in a large skillet over medium-high heat. Once the oil shimmers, add the seasoned chicken breasts. Cook for 5 to 6 minutes per side until golden brown and the internal temperature reaches 165°F. Transfer to a plate and set aside.
03 - In the same skillet, add the finely chopped onion. Sauté for about 3 minutes until softened and translucent. Add the minced garlic and cook for 1 additional minute until fragrant.
04 - Add the halved cherry tomatoes to the skillet. Sauté for 3 to 4 minutes until they begin to soften and release their juices. Pour in the chicken broth and bring the mixture to a gentle simmer.
05 - Stir in the chopped spinach and cook for approximately 2 minutes, tossing gently until just wilted.
06 - Return the seared chicken breasts to the skillet, nestling them into the tomato-spinach mixture. Simmer for another 2 to 3 minutes until the chicken is heated through and the flavors meld.
07 - Transfer to plates and sprinkle with grated Parmesan cheese if desired. Serve immediately over rice, pasta, or cauliflower rice for a complete meal.