01 - Place chicken breasts between sheets of parchment paper and gently pound to an even thickness of about ½ inch using a meat mallet or rolling pin.
02 - In a shallow bowl, combine the flour, salt, and pepper. Dredge each chicken breast lightly in the seasoned flour mixture, shaking off any excess.
03 - Heat 2 tablespoons of olive oil in a large skillet over medium-high heat. Add the chicken and cook for 4–5 minutes per side until golden brown and cooked through. Transfer to a plate and loosely cover to keep warm.
04 - Add the remaining tablespoon of olive oil to the skillet. Sauté the mushrooms for 4–5 minutes until deeply browned. Add the minced garlic and cook for 30 seconds until fragrant.
05 - Pour in the dry Marsala wine, scraping up any browned bits from the bottom of the pan. Cook for 2–3 minutes until the liquid is reduced by half.
06 - Add the chicken broth to the skillet and simmer for 3–4 minutes, allowing the flavors to meld and the sauce to begin reducing.
07 - Return the chicken to the skillet, spooning the mushroom sauce over the top. Simmer for 3–5 minutes until the chicken is heated through and the sauce has thickened slightly. Garnish with chopped fresh parsley and serve hot.