Open and drain cans of yams.

Line a 13x9 baking pan with foil (makes clean up easier), and place yams in as close to single layer as you can.

Sprinkle raisins generously over yams, and cover with brown sugar.

Cover thoroughly with the marshmallows, and place into preheated to 350* oven for approximately 30-35 minutes, until tops of marshmallows are golden brown and gooey. Enjoy!