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Grilled London Broil

(4 Votes)
Grilled London Broil
1 Hr
30 Min

London Broil is simply a steak that's been tenderized by marinating, then broiled or grilled and served thinly sliced across the grain. Our flavorful homemade marinade makes our Grilled London Broil sizzle with taste!

What You'll Need

  • 1 (2-pound) London broil steak (beef top round)
  • 3/4 cup balsamic vinegar, divided
  • 1/4 cup olive oil
  • 1/2 cup spicy brown mustard, divided
  • 2 cloves garlic, minced
  • 1 1/4 teaspoons salt, divided
  • 1/2 teaspoon black pepper
  • 1/4 cup (1/2 stick) butter
  • 4 sweet onions, thinly sliced

What to Do

  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 1 hour.
  3. Meanwhile, in a large skillet over medium-high heat, melt butter. Add onions and saute 12 to 15 minutes, 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 12 to 15 minutes for medium-rare, or to desired doneness beyond that, turning frequently; baste often with marinade during only the first 5 minutes of cooking. Thinly slice steak against the grain and serve topped with sauteed onions.


A side of our French Roasted Potatoes and you're good to go!

Ratings & Comments

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My family liked this london broil. My only comment is that you must really like the taste of balsamic vinegar to enjoy this dish as it is very prominent.

SOOO good. It can also be done under the broiler.

im going to swing it my own way , with some of these great tip's. ty

So, is this a " flank steak " or is it " London broil (beef top round) steak " -- 2 VERY different cuts of beef which would yield 2 very different results. (Either of which would taste good!)


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