Preheat oven to 350ºF. Grease 10 inch round pan/dish. Process the yams in food processor with 2 tablespoons batter, sugar, corn syrup, sherry, cinnamon and salt until smooth. Spread 1/2 of mixture in dish; arrange 1/2 of apples; repeat. Brush with remaining butter; cover and refrigerate if made ahead. Bring to room temperature before baking. Bake 30 minutes uncovered. Goes great with turkey.