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Grilled London Broil

Grilled London Broil

scott14

Prep 1 hr1h
Cook 30 mins30m
Serves 6

Ingredients

  • 1 london broil (beef top round) steak
  • ¾ cup balsamic vinegar (divided)
  • ¼ cup olive oil
  • ½ cup spicy brown mustard (divided)
  • 2 garlic cloves (minced)
  • 1 ¼ teaspoons salt (divided)
  • ½ teaspoon black pepper
  • ¼ cup butter (½ stick)
  • 4 sweet onions (thinly sliced)

Instructions

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  • 1
    Place steak in a large resealable plastic bag
  • 2
    In a medium bowl, combine 1/2 cup vinegar, the oil, 1/4 cup mustard, the garlic, 1/2 teaspoon salt, and the pepper; mix well. Pour over steak then seal bag and chill .
  • 3
    Meanwhile, in a large skillet over medium-high heat, melt butter. Add onions and saute , or until very tender, stirring occasionally. Add remaining vinegar, mustard, and salt. Reduce heat to medium-low and cook until mixture thickens, stirring often.
  • 4
    Preheat grill to high heat. Grill steak for medium-rare, or to desired doneness beyond that, turning frequently; baste often with marinade during only the first of cooking. Thinly slice steak against the grain and serve topped with sauteed onions.

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