sheet. Spread into an even layer, then sprinkle with 2
more tablespoons vinegar. Allow to cool to room
temperature, about 30 minutes.
- Combine the remaining 2 tablespoons sugar, the
remaining 2 tablespoons vinegar, the celery, onion,
scallions, if using, parsley, if using, pickles, mustard, and
mayonnaise in a large bowl. Stir with a rubber spatula to
combine. Fold in the potatoes. Season to taste with salt
and pepper. Cover and let rest in the refrigerator for at
least 1 hour, and up to 3 days, before serving.
