Peel the banana and slice it in half lengthwise.

Place both slices of the banana on a sheet of heavy duty aluminum foil and top with of the chocolate chips and marshmallows.

Bring up sides of aluminum foil and secure the edges by folding them over each other 2 to 3 times.

Bake on barbecue over medium heat or above camping coals on a rack for 30 minutes.

Be careful in peeling back aluminum foil. Banana should be soft and the chocolate and marshmallows melted.