cut banana peels lengthwise about 1/2 in deep, leaving 1/2 in at both ends. Open peel wider to form a pocket and feel each banana with a teaspoon each of the mini chocolate chips and mini marshmallows.
Grill covered over medium heat for 5-10 minutes or until marshmallows melt and are golden brown.
You can also wrap in foil and cook right in the campfire. Just be sure to keep a close eye on them as the chocolate and marshmallows melt quickly.