Notes: The texture of the salad depends on how you mash the eggs: For a fluffier quality, separate the whites and yolks and mash with a fork or whirl separately in a food processor to desired consistency; for a creamier texture, mash or whirl whites and yolks together. As flavor alternatives, substitute 1 teaspoon curry powder and/or 1 tablespoon chopped fresh dill for the tarragon. You can make the egg salad (step 1), Pickled Onion Salad, and Melted Cucumbers up to 1 day ahead; cover separately and chill.