01 - Place chicken breasts between two sheets of plastic wrap and pound to an even ½-inch thickness using a meat mallet. Season both sides generously with salt and freshly ground black pepper.
02 - Arrange three shallow dishes: the first with all-purpose flour, the second with eggs beaten together with 2 tablespoons of water, and the third with Romano cheese combined with breadcrumbs.
03 - Dredge each seasoned chicken breast in flour, shaking off any excess. Dip into the egg wash, then firmly press into the Romano-breadcrumb mixture, ensuring an even and thorough coating on all sides.
04 - Heat olive oil and 2 tablespoons of butter in a large skillet over medium heat. Working in batches to avoid crowding, add the breaded cutlets and cook for 3 to 4 minutes per side until deeply golden and cooked through to an internal temperature of 165°F. Transfer to a warm plate and tent loosely with foil.
05 - Carefully pour off excess oil from the skillet. Add the fresh lemon juice and lemon zest to deglaze the pan, scraping up any fond from the bottom. Stir in the remaining 2 tablespoons of butter and simmer gently for 1 to 2 minutes until the sauce slightly thickens and becomes glossy.
06 - Return the chicken cutlets to the skillet and spoon the lemon-butter sauce over each piece. Cook for 1 to 2 minutes to warm through and allow the flavors to meld.
07 - Transfer to a serving platter, spoon any remaining pan sauce over the top, and garnish generously with chopped fresh parsley. Serve immediately with lemon slices alongside.