4 slices deli Swiss cheese (sliced on the thick side)
Preheat oven to 400 degrees F. Lightly grease a large roasting pan.
Set up a dredging station by whisking the egg, milk and mustard together in a shallow dish, season with salt and pepper. In a second wide, shallow dish combine both bread crumbs and flour together.
Season the chicken cutlets lightly on each side with salt and pepper. Place a slice each of swiss and ham (trim to fit the cutlet, if needed) over top and roll up beginning from the smallest end of the chicken. Secure with a toothpick or two. Repeat until they are all rolled up. Dredge one at a time by dipping into the egg and then into the bread crumbs using your hands to pat the crumbs on. Set in roasting pan and repeat until all are covered with crumbs.
Bake about 25 minutes, depending on the thickness/size of your cutlets (internal temp should reach 164-175 degrees F). Remove from oven and allow to set 5 minutes. Remove toothpicks and cut into slices 1-2 inches thick, if desired or serve as is.