Cut chicken in half horizontally. Pound each piece until 1/2 inch thick. Sprinkle with salt and pepper.
Add flour to a shallow dish.
Add egg to a shallow bowl and whisk, set aside.
Add breadcrumbs and Parmesan cheese to a shallow bowl and mix to combine.
Starting with the flour and ending with breadcrumbs, dip the chicken into the flour, egg and Parmesan breadcrumbs.
Add oil to a large skillet and heat over medium high heat.
Once hot add in chicken two at a time to the skillet. Cook 2-3 minutes on each side or until golden grown and cooked all the way through.
Place chicken in a pan or sheet tray and top with mozzarella cheese.
Broil on high until melted and bubbly. Top with tomato sauce and a sprinkle of basil for serving, if desired. Serve immediately and enjoy!