Combine brown sugar, graham crumbs and spices. Set aside. Set each banana on a piece of foil large enough to wrap it; place banana curved side down so it sits up like a boat. Split the banana in half lengthways, all the way down to the skin, but not through the skin. Pry the banana open and fill it with chocolate chips, marshmallows and the crumb mixture. Fold the foil up around the banana and seal it shut. Place the bananas upright on the BBQ and cook over medium heat for about 20 minutes or so. The marshmallows and chocolate should be melted and the banana warm throughout. Yield: 4 desserts