1/4 cup white wine vinegar
1/4 cup water
2 teaspoons Kosher salt (you can go up to 1 tablespoon if using the lighter weight Diamond brand; here’s why)
1 1/2 teaspoons granulated sugar
2 stalks celery, trimmed, diced tiny
4 large eggs
1 heaped teaspoon whole-grain Dijon
2 teaspoons minced shallot or red onion (or more to taste)
2 tablespoons mayonnaise or full-fat plain yogurt
Salt and freshly ground pepper to taste
Chopped flat-leaf parsley or fresh dill (to garnish, optional)