With an electric mixer, beat yams, pineapple, and cinnamon until smooth. Pour into a greased casserole pan.
Preheat oven to 350 degrees F. Combine the remaining ingredients and sprinkle on top. Bake 20 minutes or until marshmallows are golden brown. Serve warm.
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A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.
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