2. Materials: appropriate amount of yam, appropriate amount of milk, 1 tablespoon of sugar, 2 tablespoons of strawberry jam.
3. Practice: Wash yam; Put in a steamer and steam over high fire; Peeling after steaming; Break it into small pieces and put it in a cooking cup, add a spoonful of sugar and a proper amount of milk; Beat it into mud; Dig out the mashed yam with an ice cream spoon and put it in a small bowl; Add twice as much water to a spoonful of strawberry jam and stir well; Pour on the yam mud.