01 - Place chicken breasts between two sheets of plastic wrap and pound to ½-inch thickness using a meat mallet. Season both sides generously with salt and freshly ground black pepper.
02 - Arrange three shallow bowls: 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 press firmly into the Romano-cheese and breadcrumb mixture, ensuring an even, adherent coating on all sides.
04 - Heat olive oil and 2 tablespoons of unsalted butter in a large skillet over medium heat. Working in batches if needed, cook the breaded cutlets for 3 to 4 minutes per side until deeply golden and cooked through to an internal temperature of 165°F. Transfer to a plate and tent loosely with foil to keep warm.
05 - Carefully pour off excess oil from the skillet. Add the fresh lemon juice and lemon zest to deglaze, scraping up any fond from the bottom of the pan. Stir in the remaining 2 tablespoons of butter and simmer for 1 to 2 minutes until the sauce lightly thickens and becomes glossy.
06 - Return the chicken cutlets to the skillet, spooning the lemon-butter sauce generously over each piece. Cook for 1 to 2 minutes to heat through. Garnish with chopped fresh parsley and serve immediately with lemon slices alongside.