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, allowing surplus to drip off, then press firmly into the Romano-cheese and breadcrumb mixture until evenly coated on all sides.
04 - Heat olive oil and 2 tablespoons of unsalted butter in a large skillet over medium heat. Carefully add the breaded cutlets in batches to avoid overcrowding. 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 aluminum foil.
05 - Pour off any excess oil from the skillet. Add the fresh lemon juice and lemon zest to deglaze the pan, scraping up all the fond and browned bits from the bottom. Stir in the remaining 2 tablespoons of butter and simmer 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 the top. Cook for 1 to 2 minutes to gently reheat through. Garnish with chopped fresh parsley and additional lemon slices, then serve immediately.