Roast Beef and Celery Root with Watercress Salad

Prep Time:
15 mins
Total Time:
1 hrs 15 mins

Save some of this delicious dinner for a filling and satisfying Roast Beef Sandwich for lunch tomorrow.


  • 2 ½ pounds top round roast

  • Coarse salt and ground pepper

  • 6 tablespoons olive oil

  • 2 teaspoons fresh thyme leaves

  • 2 medium bulbs celery root (2 pounds total), peeled

  • ¾ pound red new potatoes, halved if large

  • 1 tablespoon fresh lemon juice

  • 1 teaspoon white-wine vinegar

  • 1 large bunch watercress (10 ounces), trimmed


  1. Remove roast from refrigerator 30 minutes before cooking. Preheat oven to 400 degrees. Using kitchen twine, tie beef at 1 1/2-inch intervals; pat dry with paper towels. Season with salt and pepper.

  2. In a large pan, heat 2 tablespoons oil on high. Brown roast all over, 9 minutes. Place on a rimmed baking sheet; sprinkle with thyme. Reserve half of one celery root for roast beef sandwiches; cut remainder into 1 1/2-inch chunks. In a bowl, toss celery root and potatoes with 2 tablespoons oil. Season with salt and pepper; add to sheet. Roast until beef is medium-rare, about 40 minutes (an instant-read thermometer inserted in center should register 125 degrees). Transfer beef to a cutting board; tent with foil. Let rest 15 minutes.

  3. Meanwhile, whisk together lemon juice, vinegar, and 2 tablespoons oil; season dressing with salt and pepper. Save a handful of watercress for sandwiches; toss remainder with dressing. Reserve one-third the beef for sandwiches; slice remainder. Serve beef and vegetables with salad.

Cook's Notes

For tomorrow's sandwiches, refrigerate reserved watercress, celery root, and roast beef. To keep watercress crisp, wrap it in paper towels.

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