Watermelon Waldorf Salad Posted in Watermelon Print Recipe Watermelon Waldorf Salad Waldorf salad just got another key ingredient...watermelon! Adding watermelon to this dish is sure to add a unique twist to this old-time dish. Author: The National Watermelon Promotion Board Ingredients2 cups cubed watermelon about ½-inch cubes1/2 cup sliced celery1/2 cup seedless red grape halvesdash of salt1/4 cup Greek yogurt2 tablespoons sliced almonds toasted InstructionsStir together watermelon, celery, and grapes in bowl. Just before serving, stir salt into yogurt for dressing. You may want to add a little water to lighten the thickness. Pour mixture over fruit and stir until coated. Sprinkle with almonds.