Mix together the grapes, mayonnaise, onions, curry powder and apples in a medium bowl. Gently toss the pickled herring with the curried mayonnaise mixture until thoroughly combined. Refrigerate for 30 minutes prior to serving.
Serve on buttered rye bread and garnish with green grapes.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.