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- 3 lbs. new potatoes, scrubbed
- 1/4 cup white wine vinegar
- 2 Tbs. Dijon mustard
- 2 Tbs. whole-grain mustard
- Kosher salt and freshly ground black pepper
- 1/4 cup olive oil
- 2 ribs celery, thinly sliced
- 3/4 cup chopped tender celery leaves
Place the potatoes in a pot and cover them with cold salted water. Bring to a boil, reduce to a simmer, and cook for 12 to 14 minutes, or until just tender. Drain and set aside to cool.
Combine the vinegar, Dijon mustard, and whole-grain mustard. Season with salt and pepper to taste. When the potatoes are cool, quarter them, and toss them in the mustard-vinegar mixture. Refrigerate until completely cold.
Add the oil, celery, and celery leaves and toss. Serve immediately.