Trim the fat off your chicken and then butterfly it in half, place in between two pieces of plastic wrap. Pound the chicken with a mallet until ¼ inch thick.
Place one piece of the chicken in flour, cover on both sides and shake off excess flour.
Take that same piece of chicken and put into the egg wash, let excess drain off.
Then take the chicken and put into breadcrumb mixture.
Continue to pound and bread your remaining chicken.
Add the oil to a frying pan on medium-high heat and add the chicken, cook for 3 minutes on each side.
Once your chicken is cooked place it on a wire rack to allow the remaining oil to drain off.
In a small saucepan add the butter until melted, then add onion, cook till translucent.
Add the garlic and scallions.
Cook for 5 minutes, add white wine and cook for another 5-7 minutes.
Add salt and pepper to taste.
Place the chicken on a sheet pan and pour the Kiev sauce over your chicken.
Bake for 10 minutes on 400 degrees F.