DIRECTIONS
Remove stems from mushrooms; set caps aside. Chop stems, reserving 1/3 cup (discard remaining stems or save for another use).
In a small skillet, saute chopped mushrooms and celery in butter. In a small bowl, combine the mushroom mixture, apple, bread crumbs, walnuts, blue cheese, parsley and lemon juice.
Place mushroom caps on a greased baking sheet; stuff with apple mixture. Bake at 375° for 15-20 minutes or until mushrooms are tender. Serve warm. Yield: 1-1/2 dozen.