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flank steak
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Flank Steak With Parsley Mustard Sauce

This flank steak recipe from Mary Fran Wiley hits all the bases: delicious, easy, and needs just basic ingredients from your pantry. 
Prep Time5 mins
Cook Time10 mins
Total Time15 mins
Course: Main Course
Cuisine: American
Keyword: gluten-free dinner recipe, gluten-free main dishes, meat recipes, steak recipes
Servings: 4 people
Author: Mary Fran Wiley



  • 1 pound quality flank steaks
  • Paprika, about 1 teaspoon total
  • olive oil, about 1 teaspoon
  • salt & pepper


  • ½ bunch fresh flat-leaf parsley
  • 1 heaped teaspoon yellow mustard
  • 1 tablespoon extra virgin olive oil
  • juice from ½ lemon, or 1 small lemon
  • salt & pepper


  • Drizzle your steak with olive oil and sprinkle with the paprika, salt and pepper on each side (make sure you rub the seasoning into your steak).
  • Set a cast iron or grill pan over high heat, and make sure it is hot before adding the steaks.
  • While they cook, roughly chop the parsley leaves and finely chop the stalks on a cutting board. Add the mustard, lemon juice, olive oil. Season with salt and pepper and mix together, either on your cutting board or in a bowl. (It is perfectly acceptable to just smush it around on your cutting board). If you mix it in a bowl, spread it on your serving plate.
  • Slice the cooked steak and toss with the sauce.
  • Serve with a salad or some quick-cooked veg.