Cut each chicken breast into 2-3 pieces. Pound each piece with a meat mallet, between a sheet of plastic wrap, to a ¼ inch thickness.
Season each piece with salt and pepper.
Set up a breading station: place flour in the first bowl, beaten eggs and the juice of 1 lemon, in the second bowl. Place breadcrumbs, Parmesan cheese, zest of one lemon, ¼ cup chopped parsley, and chopped oregano in the third bowl. Stir to combine.
Dredge seasoned chicken in the flour, shaking off excess flour.
Dip chicken in lemon/egg mixture, to coat completely.
Dip chicken in the breadcrumb mixture, pressing breadcrumbs onto the chicken.
Heat a couple tablespoons butter in a large skillet over medium heat. Fry cutlets, 3-4 at a time until golden crispy brown.
Place cooked cutlets on a platter lined with a paper towel and keep them warm in the oven while you fry up the remaining cutlets adding more butter to the pan as needed.
Remove pan from heat and wipe out the pan to remove any breadcrumbs left in the pan.
Heat butter over medium heat in the same skillet you used to cook up the cutlets.
Add minced garlic and cook until fragrant, about 1 minute.
Add 2 tablespoons chopped parsley and the zest and juice of 2 lemons to the pan.
Whisk garlic butter with the lemon juice mixture in the pan until heated through and fragrant, about 1 minute.
Place warm cutlets on a large serving platter. Drizzle cutlets with the lemon garlic butter pan sauce.
Garnish with slices of lemon if desired.
Serve immediately over a bed of creamy mashed potatoes.