In the oven, preheat the temperature to 375 degrees Fahrenheit (190 degrees Celsius).
Ziploc bags or plastic wraps are ideal for keeping chicken breasts fresh. A meat mallet's flat side can be used to pound them into about 1/4-inch thickness.
Both sides of the chicken breasts must be seasoned with salt and pepper.
Stir together 1/2 teaspoon pepper, 1 teaspoon salt, and flour in a shallow bowl. Add the egg and water to another shallow bowl and whisk together. Another shallow bowl should be used for the breadcrumbs.
Shake off any excess flour from the chicken breasts after draping them in flour. Bread crumbs should be coated with egg mixture and dipped in it.
2 tablespoons olive oil should be heated to a shimmering state in a large sauté pan over medium heat. To cook the chicken breasts, add 3 tablespoons of oil to the hot pan and cook them until golden brown on both sides.
Place chicken breasts on a parchment paper or baking mat-lined baking sheet and bake for 10 to 12 minutes, or until cooked.
In the meantime, heat a sauté pan over medium heat with 1 tablespoon butter and 1 tablespoon olive oil. Place the reserved lemon halves cut side down on the stove with the cut side down, and cook for about 3 minutes, until golden brown. Discard the lemon halves after removing them.
In the same pan, combine the remaining 2 tablespoons of butter, lemon juice, white wine, 1 teaspoon salt, and 1/2 teaspoon pepper, and heat until it melts. Until the sauce is slightly reduced, simmer for three to four minutes.
Spoon the sauce over the chicken piccata and serve. Slice a lemon and sprinkle chopped parsley on top.