1. Preheat oven to 375°.
2. Place yams in a large bowl. Coarsely mash with a potato masher. Stir in crème fraîche and next 6 ingredients (through egg). Spoon potato mixture into an 8-inch square glass or ceramic baking dish coated with cooking spray. Sprinkle with marshmallows and almonds. Bake at 375° for 30 minutes or until thoroughly heated and marshmallows are browned.