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marinated flank steak sandwich on ciabatta with arugula and blue cheese wrapped in deli paper

Marinated Flank Steak Sandwich

Krista Stechman
Tender juicy marinated flank steak on a crispy ciabatta roll with burnt onion aioli, arugula and blue cheese crumbles
Prep Time 25 mins
Cook Time 35 mins
Marinating time 30 mins
Total Time 1 hr 30 mins
Course dinner, lunch
Cuisine american
Servings 4 people
Calories 710 kcal


  • oven
  • food processor


Burnt Onion Aioli

  • 2 yellow onions large dice
  • 1 tbsp olive oil
  • ½ tsp kosher salt
  • ¼ tsp black pepper
  • 1 tbsp fresh thyme destemmed and roughly chopped
  • 1 tsp lemon juice
  • ½ cup mayo

Marinade and Steak

  • cup olive oil plus 1 tbsp
  • ¼ cup red wine vinegar
  • 1 tbsp brown sugar
  • tsp kosher salt
  • ½ tsp black pepper
  • 3 cloves garlic minced
  • 1.5 lbs flank steak

Bread and Toppings

  • 4 pieces ciabatta roll
  • 2 oz blue cheese crumbles
  • 1 oz arugula


Making the Burnt Onion Aioli

  • Preheat the oven to 450°F and line a baking sheet with parchment paper
  • Add the chopped onion, olive oil, salt, pepper and thyme to the baking sheet and mix well. Roast for 35 minutes turning tray halfway through
  • Remove from oven, add to food processor along with the fresh lemon juice and mayo. Blend until fairly smooth, about 30-45 seconds. Set aside until later
    burnt onion aioli in a small glass jar with a spreader next to it

Marinate the flank steak

  • Mince the garlic and add all the marinade ingredients into a gallon size ziplock bag. Mix well and add the flank steak. Let sit for 1-4 hours
  • Heat a cast iron or large skillet until very hot
  • Remove the flank steak from the marinade, lightly salt each side of the steak and sear each side for 4 minutes
  • Let the steak rest for 5-10 minutes before slicing

Baking the Ciabatta and Serving

  • Preheat the oven to 400°F and bake the ciabatta bread right on the rack for 5-7 minutes until golden brown
  • Slice the steak against the grain on a slight diagonal
  • Slice the ciabatta open, smear both sides with burnt onion aioli, add the steak, blue cheese crumbles and arugula. Serve warm and enjoy!
    marinated flank steak sandwich on ciabatta with arugula and blue cheese


Calories: 710kcalCarbohydrates: 11gProtein: 41gFat: 55gSaturated Fat: 12gPolyunsaturated Fat: 15gMonounsaturated Fat: 25gTrans Fat: 1gCholesterol: 124mgSodium: 1350mgPotassium: 765mgFiber: 1gSugar: 6gVitamin A: 381IUVitamin C: 9mgCalcium: 154mgIron: 4mg
Keyword aioli, burnt onion, dinner, flank steak, sandwich, steak, steak sandwich
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