Grilled London Broil with Caramelized Onions

Savor the robust flavors of this Grilled London Broil with Caramelized Onions, a perfect harmony of tender, marinated steak and sweet, golden onions. This recipe transforms a budget-friendly cut of beef into a gourmet centerpiece by marinating it in a savory blend of soy sauce, balsamic vinegar, garlic, and rosemary, ensuring each bite is juicy and flavorful. Caramelized onions, slowly cooked with butter and a hint of brown sugar, add a rich, melt-in-your-mouth sweetness that perfectly complements the smoky, char-grilled steak. Ideal for summer barbecues or a cozy dinner at home, this dish is easy to prepare yet impressive enough to wow your guests. Serve it with roasted vegetables or a crisp green salad for a balanced, crowd-pleasing meal. Keywords: Grilled London Broil, caramelized onions, marinated steak, easy grilling recipes, steak dinner ideas.

Nutriscore Rating: 66/100

Prep Time:15 mins

Cook Time:45 mins

Total Time:60 mins

Servings: 6

Ingredients

• 2 pounds London broil steak (top round)
• 3 tablespoons Olive oil
• 4 tablespoons Soy sauce
• 2 tablespoons Balsamic vinegar
• 1 tablespoon Honey
• 4 Garlic cloves, minced
• 1 teaspoon Dried rosemary
• 1 teaspoon Salt
• 1 teaspoon Black pepper
• 3 large Yellow onions, thinly sliced
• 3 tablespoons Butter
• 1 teaspoon Brown sugar
• 3 tablespoons Beef broth

Directions

Step 1

In a medium mixing bowl, combine olive oil, soy sauce, balsamic vinegar, honey, minced garlic, dried rosemary, salt, and black pepper to create the marinade.

Step 2

Place the London broil steak in a resealable plastic bag and pour the marinade over it. Seal the bag, ensuring the steak is fully coated in the marinade. Refrigerate for at least 4 hours or overnight for best results.

Step 3

About 30 minutes before grilling, remove the steak from the refrigerator to come to room temperature.

Step 4

Preheat the grill to medium-high heat (around 400°F). Oil the grill grates to prevent sticking.

Step 5

While the grill is preheating, prepare the caramelized onions. In a large skillet over medium heat, melt the butter. Add the sliced onions and a pinch of salt, stirring occasionally.

Step 6

Cook the onions for 15-20 minutes, or until they are golden and caramelized. Stir in the brown sugar and beef broth, and cook for another 2-3 minutes until the mixture is slightly reduced. Set the onions aside and keep warm.

Step 7

Remove the steak from the marinade and discard the marinade. Pat the steak dry with paper towels to ensure a good sear.

Step 8

Grill the steak for 4-5 minutes per side for medium-rare, or longer if you prefer a different level of doneness. Use a meat thermometer to check the internal temperature (130°F for medium-rare).

Step 9

Once cooked, remove the steak from the grill and let it rest for 10 minutes, tented with foil to retain juices.

Step 10

Slice the steak thinly against the grain and arrange on a serving platter. Top with the caramelized onions and serve immediately.

Nutrition Facts

Serving size	(1627.2g)

Amount per serving	% Daily Value*
Calories	2853.4

Total Fat 130.8g	0%
Saturated Fat 47.2g	0%
Polyunsaturated Fat 5.1g
Cholesterol 845.8mg	0%
Sodium 5723.7mg	0%
Total Carbohydrate 77.2g	0%
Dietary Fiber 9.4g	0%
Total Sugars 44.6g
Protein 333.2g	0%

Vitamin D 6.7IU	0%
Calcium 292.0mg	0%
Iron 30.4mg	0%
Potassium 5032.7mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 41.8%

Protein: 47.3%

Carbs: 11.0%