Grilled Flank Steak Sandwich

Sink your teeth into this Grilled Flank Steak Sandwich, a mouthwatering masterpiece that combines tender, marinated steak with layers of bold flavors and textures. Juicy, perfectly grilled flank steak is sliced thin and paired with caramelized onions, peppery arugula, and a creamy Dijon mayo spread, all tucked into a crusty baguette or ciabatta roll. The steak's marinade features a savory blend of soy sauce, balsamic vinegar, and garlic, ensuring every bite is packed with flavor. Optional Swiss cheese adds a melty, indulgent touch, while the toasted bread provides the perfect crisp contrast. This gourmet sandwich is easy to make yet utterly satisfying, making it ideal for lunches, casual dinners, or backyard cookouts. Perfectly balanced and bursting with flavor, this recipe is a must-try for sandwich lovers and steak enthusiasts alike!

Nutriscore Rating: 57/100

Prep Time:20 mins

Cook Time:20 mins

Total Time:40 mins

Servings: 4

Ingredients

• 1 lb flank steak
• 2 tbsp olive oil
• 2 tbsp soy sauce
• 1 tbsp balsamic vinegar
• 2 garlic cloves, minced
• 1 tsp black pepper
• 1 tsp kosher salt
• 1 baguette (or ciabatta rolls)
• 3 tbsp mayonnaise
• 1 tbsp Dijon mustard
• 1 cup arugula
• 1 large onion, thinly sliced
• 1 tbsp butter
• 4 slices Swiss cheese (optional)

Directions

Step 1

In a small bowl, whisk together olive oil, soy sauce, balsamic vinegar, minced garlic, black pepper, and kosher salt to create a marinade.

Step 2

Place the flank steak in a resealable plastic bag or shallow dish and pour the marinade over it. Seal or cover and let it marinate in the refrigerator for at least 1 hour, ideally overnight.

Step 3

Preheat your grill to medium-high heat. Remove the flank steak from the marinade and allow any excess marinade to drip off.

Step 4

Grill the steak for 4-5 minutes per side, or until it reaches your desired level of doneness (130°F for medium rare). Remove it from the grill and allow it to rest for 10 minutes before slicing thinly against the grain.

Step 5

While the steak rests, heat a skillet over medium heat and melt the butter. Add the thinly sliced onion and cook, stirring frequently, until the onions are caramelized and golden brown, about 12-15 minutes. Remove from heat and set aside.

Step 6

In a small bowl, mix mayonnaise and Dijon mustard to make a spread.

Step 7

Slice the baguette (or ciabatta rolls) in half lengthwise and lightly toast on the grill or under the broiler.

Step 8

Spread the Dijon mayo evenly on the toasted bread. Layer with arugula, slices of grilled flank steak, caramelized onions, and Swiss cheese if using.

Step 9

Slice the sandwich into portions and serve immediately.

Nutrition Facts

Serving size	946.3 grams (946.3g)

Amount per serving	% Daily Value*
Calories	2505

Total Fat 176.60g	226%
Saturated Fat 56.70g	284%
Polyunsaturated Fat 5.80g
Cholesterol 591mg	197%
Sodium 4452mg	194%
Total Carbohydrate 63.70g	23%
Dietary Fiber 5.30g	19%
Total Sugars 10.60g
Protein 174.50g	349%

Vitamin D 44IU	222%
Calcium 1150mg	88%
Iron 15mg	82%
Potassium 1972mg	42%

*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: 62.5%

Protein: 27.5%

Carbs: 10.0%