Ingredients

  • 3 Tbs. unseasoned rice vinegar
  • 1 tsp. finely chopped fresh thyme
  • 2 Tbs. olive oil
  • 1 1/2 tsp. Dijon mustard
  • 1/2 cup chopped red onion
  • 2 lb. red-skinned potatoes, quartered and sliced 3/4-inch thick
  • 4 large celery stalks, sliced 1/2- to 3/4-inch thick (2 cups)
  • 1 cup packed, coarsely chopped mustard greens (1 oz.)

Method

  • Whisk together vinegar and thyme in small bowl.
  • Whisk in oil and mustard, and season with salt and pepper, if desired.
  • Stir in chopped onion.
  • Marinate 20 minutes, tossing often.
  • Meanwhile, steam potatoes 13 to 14 minutes, or until tender.
  • Transfer steamer rack to work surface, and let potatoes cool 5 minutes.
  • Toss potatoes with dressing in wide, shallow bowl.
  • Cool 10 minutes, or until dressing is absorbed, tossing occasionally.
  • Steam celery 6 minutes, or until only slight crunch remains.
  • Cool briefly.
  • Fold into potatoes.
  • Fold in mustard greens.
  • Season with salt and pepper, if desired.