"Millions who never visited the Waldorf owe him a debt," The New York Times wrote in 1950, upon Oscar Tschirky's death. Mr. Tschirky, a Swiss immigrant who became known as "Oscar of the Waldorf," is credited with creating this piece of Americana in 1893, a timeless dish whose popularity has spread far past the Waldorf's exclusive doors and into home kitchens. Over time, variations would include blue cheese, raisins and chopped walnuts, which can be added here alongside the celery and apples…
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