Grilled London Broil

(Courtesy of mrfood.com)

 Ingredients:

1 (2-pound) London broil (beef top round) steak

3/4 c. balsamic vinegar, divided

1/4 c. olive oil

1/2 c. spicy brown mustard, divided

2 garlic cloves, minced

1 1/4 tsp. salt, divided 

1/2 teaspoon black pepper

1/4 cup (1/2 stick) butter

4 medium-sized sweet onions, thinly sliced

Directions:
Place steak in a large ziploc bag.  In a medium bowl, combine 1/2 c. vinegar, oil, 1/4 c. mustard, garlic, 1/2 tsp. salt and pepper; mix well.  Pour over the steak then seal the bag and chill for 1 hour.  Meanwhile, in a large skillet, melt butter over medium-high heat.  Add onions and saute for 12-15 minutes or until very tender, stirring occasionally.  Add remaining 1/4 c. vinegar, 1/4 c. mustard and 3/4 tsp. salt.  Reduce heat to medium-low an cook until mixture thickens, stirring often.  Preheat grill to high heat.  Grill steak 12-15 minutes for medium-rare or to desired doneness beyond that, turning frequently; baste often with marinade from the stove during only the first 5 minutes of cooking.  Thinly slice the steak and serve topped with sauteed onions.

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