According to the American Century Cookbook, the first Waldorf Salad was created in New York City in 1893, by Oscar Tschirky, the maître d’hôtel of the Waldorf Astoria.
The original recipe consisted only of diced red-skinned apples, celery, and mayonnaise. Chopped walnuts were added later to this now American classic.
Some prefer their Waldorf salad made with yogurt, instead of mayo. I prefer Cesar dressings. Having had this salad at summer, very refreshing and tasty.
Idea from: Simly Recipes