This is form "Cooking by Hand" by Paul Bertolli. Start with a skin on chicken breast.
Remove the breast from the bone and small filet (pull the tendon off of this piece).
You'll need two fresh sage leaves per breast from your garden or the neighbors. You'll also need a slice of prosciutto and some fontina cheese.
Starting from the side away from the breast bone, cut a pocket as large as you can manage without cutting through the breast with your knife parallel to the cutting board (no cutting yourself please).
Add the sage then the ham.