Boil yams until tender and peel while hot. Place them in mixing bowl with butter,
cream of coconut, heavy cream, egg yolks and spices. Whip until smooth. Place in
casserole. Press marshmallows into mixture so they are half submerged. Sprinkle
lightly with cinnamon.
Bake at 350 degrees F for 30 minutes or until
marshmallows are melted.