Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   3      medium        yams -- about 1 1/2 lb
                        -- sliced 1 inch thick
     3/4  cup           crushed pineapple -- juice pack drained
   4      tablespoons   pure maple syrup
   2                    egg whites

Preparation:

Cook yams in boiling water for 25-35 minutes or until very soft and tender. Drain and mash thoroughly until consistency is smooth. Preheat oven to 400~ Mix drained pineapple and 3 tablespoons syrup into mashed yams. Spoon into a 9 inch round or 8 inch square non-stick baking pan. Beat egg whites to soft peaks; add remaining 1 tablesppon syrup and beat until stiff; spread with a spatula, using a swirling motion, on top of yam mixture. Bake at 400~ for 8 to 10 minutes, or until top is golden