01 - Place chicken breasts between sheets of parchment paper and gently pound to an even ½-inch thickness using a meat mallet or rolling pin.
02 - In a shallow bowl, combine the flour, salt, and black pepper. Dredge each chicken breast lightly in the seasoned flour, 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 cover loosely with foil.
04 - Add the remaining tablespoon of olive oil to the same skillet. Sauté the sliced mushrooms for 4–5 minutes until nicely browned. Stir in 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. Let the liquid reduce by half, about 2–3 minutes.
06 - Pour in the chicken broth and bring to a gentle simmer. Cook for 3–4 minutes to allow the flavors to meld together.
07 - Return the seared chicken to the skillet, spooning the mushroom sauce over the top. Simmer for an additional 3–5 minutes until the chicken is heated through and the sauce has thickened slightly.
08 - Sprinkle with freshly chopped parsley and serve hot.