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Grilled Balsamic and Soy Marinated Flank Steak

Grilled Balsamic and Soy Marinated Flank Steak


  • Author: Lisa
  • Total Time: 55 minutes
  • Yield: 4 servings 1x
  • Diet: Gluten Free

Description

Grilled Balsamic and Soy Marinated Flank Steak is your secret to turning a budget-friendly cut into a bold, juicy, and flavorful grilled masterpiece. With just a few pantry staples and less than an hour from start to finish, this steak is perfect for weeknight dinners or summer BBQs. Slice thinly and serve with your favorite sides or on top of a fresh salad.


Ingredients

Scale

½ onion, finely chopped

3 cloves garlic, minced

¼ cup olive oil

¼ cup balsamic vinegar

¼ cup soy sauce (or tamari for gluten-free)

1 tablespoon Dijon mustard

1 tablespoon fresh rosemary, chopped (or 1 teaspoon dried)

1 teaspoon salt

½ teaspoon black pepper

pounds flank steak


Instructions

Transfer the flank steak into a large zip-top bag or a shallow dish.
Evenly pour the marinade over the steak, ensuring it’s fully coated.
Before grilling, remove the steak from the marinade—discard the marinade or boil it if you’d like to use it as a sauce.
To avoid overcooking, use a meat thermometer to monitor the internal temperature accurately.

Gluten-Free Tip: Swap soy sauce with tamari or coconut aminos for a gluten-free version.

No Grill? No Problem: You can also pan-sear the steak in a hot cast-iron skillet or broil it in the oven at high heat.

For best results, always slice the steak thinly across the grain to ensure tenderness.

Storing Leftovers:

  • Refrigeration: Keep any leftovers in an airtight container and refrigerate for up to 3 days.
  • Freezing: Wrap the steak securely in plastic wrap and foil, then freeze for up to 2 months.

Notes

Marinate up to 24 hours for deeper flavor.

Swap soy sauce with tamari or coconut aminos for a gluten-free option.

Boil marinade for 5–10 minutes if reusing as sauce.

No grill? Sear in a cast-iron skillet or broil in the oven.

Store leftovers in the fridge for 3 days or freeze up to 2 months.

  • Prep Time: 10 minutes Marinate Time: 30 minutes – 24 hours
  • Cook Time: 15 minutes
  • Category: Main Course
  • Method: Grilling
  • Cuisine: American

Nutrition

  • Serving Size: Approx. 6 oz cooked steak
  • Calories: 307
  • Sugar: 4g
  • Carbohydrates: 8g
  • Protein: 22g