Flank Steak With Mustardy Onions And Rosemary Recipe

Flank Steak With Mustardy Onions And Rosemary Recipe

How To Make Flank Steak With Mustardy Onions And Rosemary

Flank steaks are lean meats that when not cooked properly end up being tough and hard to chew. Our flank steak recipe makes the cooking simple and easy.

Preparation: 15 minutes
Cooking: 20 minutes
Total: 35 minutes



  • 1 ¾lbflank steak
  • kosher saltto taste
  • freshly ground black pepperto taste
  • 1tbspolive oil
  • 1small yellow onionthinly sliced lengthwise
  • 1clovegarlic
  • 1small sprig fresh rosemaryminced, plus more for garnish
  • 2tbspdijon mustard
  • ½ cup water
  • potatoor paste, for serving, cooked


  1. Season the steak on both sides with salt and pepper.

  2. Heat the olive oil in a large cast iron skillet over medium-high heat.

  3. Add the steak and cook, undisturbed, until browned on the bottom, 5 to 6 minutes. Flip and cook on the other side for 4 minutes for medium-rare doneness, or until cooked to your liking. Transfer the steak to a plate.

  4. Return the skillet to medium heat and add the onion, garlic, and rosemary. Cook, stirring to scrape up any browned bits from the bottom of the pan, until the onion is soft and caramelized, about 6 minutes.

  5. Stir in the mustard and water, bring to a simmer, and cook until the sauce thickens, 3 to 4 minutes. Remove the skillet from the heat and season with salt and pepper.

  6. Thinly slice the steak. Spoon the mustard-onion sauce over the meat and garnish with more rosemary leaves. Serve with potatoes or pasta alongside.

  7. Enjoy!


  • Calories: 797.71kcal
  • Fat: 41.38g
  • Saturated Fat: 16.16g
  • Trans Fat: 0.00g
  • Monounsaturated Fat: 17.99g
  • Polyunsaturated Fat: 1.97g
  • Carbohydrates: 3.91g
  • Fiber: 1.30g
  • Sugar: 0.83g
  • Protein: 97.04g
  • Cholesterol: 308.44mg
  • Sodium: 1681.55mg
  • Calcium: 153.28mg
  • Potassium: 1572.56mg
  • Iron: 7.51mg
  • Vitamin A: 2.34µg
  • Vitamin C: 1.76mg
Chat Bubble Icon Share your own special recipe
Submit Your Own Recipe

Have your own special recipe to share? Submit Your Recipe Today!