Cover the breast with plastic wrap and use a meat mallet to thin them out further.
Place a slice of cheese in the middle of the breast and then place the ham on top of it.
Make sure that you get a good coating on the chicken breasts to get that nice crispy outside. You can also coat your chicken in dijon mustard before coating with flour. This will probably help the coating stay on better and give it a little extra flavor. But my kids HATE mustard, so I just dipped mine in a side of it. Also, used pretty thin slices of ham and I think that worked out well. So, when I was cutting through the chicken, the knife wasn’t getting hung up and tugging the ham out. After being cooked, the ham broke up nicely and gave it a great flavor and texture.