Ingredients

  • One 6-pound sirloin tip roast, preferably grass-fed, tied
  • 1/2 cup prepared horseradish
  • 2 tablespoons kosher salt
  • 2 tablespoons Dijon mustard
  • 2 tablespoons finely chopped parsley
  • 1 tablespoon coarsely ground black pepper
  • 1 tablespoon sugar
  • 1 tablespoon sherry vinegar

Method

  • Preheat the oven to 375.
  • Set a rack in a large, deep roasting pan and place the beef roast on the rack.
  • In a small bowl, blend the horseradish with the salt, Dijon mustard, chopped parsley, ground pepper, sugar and sherry vinegar to form a paste.
  • Slather the paste all over the top and sides of the meat.
  • Roast in the lower third of the oven for about 2 hours, until an instant-read thermometer inserted in the center of the roast registers 125.
  • Transfer the roast to a cutting board and let rest for at least 20 minutes.
  • Discard the string and thinly slice the roast beef across the grain.
  • Transfer the meat to a platter and serve.