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 water, and the third with Romano cheese thoroughly combined with breadcrumbs.
03 - Dredge each seasoned chicken breast in flour, shaking off any excess. Dip into the egg wash, allowing surplus to drip off, then press firmly into the Romano-breadcrumb mixture, coating both sides evenly.
04 - Heat olive oil and 2 tablespoons of butter in a large skillet over medium heat. Working in batches if needed, add the breaded cutlets and cook 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 aluminum foil.
05 - Carefully pour off excess oil from the skillet. Add 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 for 1 to 2 minutes until the sauce lightly emulsifies.
06 - Return the chicken cutlets to the skillet and spoon the lemon-butter sauce generously over each piece. Cook for 1 to 2 minutes to reheat through. Garnish with chopped fresh parsley and serve immediately with lemon slices on the side.