To slice chicken breasts into thin cutlets: Place a chicken breast down flat on a cutting board. Hold one hand flat on top of the breast, and use a sharp knife to cut the breast in half, parallel to the cutting board.Typically, that is all you need to do! The cutlets should be about ¼ inch in thickness. If they are thicker than that, use a meat mallet to pound them down thinner.
Boneless and skinless chicken thighs can be used in place of chicken breasts, but keep in mind that they take longer to cook.
Grate your own block mozzarella cheese instead of using pre-shredded cheese. It will melt much better.