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Key West Flank Steak

My husband, Jason, is the cook in our family. This is his recipe, inspired by his Colombian roots and our visits to Key West. Sometimes we grill extra lime and onion slices alongside. Serve with sides of rice and fried plantains. —Gretchen Ospina, Columbia Heights, Minnesota
  • Total Time
    Prep: 20 min. + marinating Grill: 15 min. + standing
  • Makes
    4 servings


  • 1 large red onion, sliced
  • 1 cup minced fresh cilantro
  • 1/4 cup white wine vinegar
  • 1/4 cup Key lime juice
  • 3 tablespoons extra virgin olive oil, divided
  • 6 Key limes, halved
  • 1 beef flank steak (1 pound)
  • 1 teaspoon kosher salt
  • 1/8 teaspoon pepper


  • In a small bowl, combine onion, cilantro, vinegar, lime juice and 2 tablespoons oil until blended. Pour 1 cup marinade into a large bowl or shallow dish. Add lime halves. Rub steak with remaining oil; sprinkle with salt and pepper. Add to bowl; turn to coat. Refrigerate 8 hours or overnight. Cover and refrigerate remaining marinade.
  • Drain steak, discarding marinade and limes in bowl. Place reserved marinade in a food processor; process until chopped.
  • Grill steak, covered, over medium heat or broil 4 in. from heat until meat reaches desired doneness (for medium-rare, a thermometer should read 135°; medium, 140°), 6-8 minutes per side. Baste occasionally with reserved marinade. Let stand 10 minutes before thinly slicing steak across the grain.
Nutrition Facts
3 ounces cooked steak: 271 calories, 16g fat (5g saturated fat), 54mg cholesterol, 431mg sodium, 12g carbohydrate (3g sugars, 3g fiber), 23g protein. Diabetic Exchanges: 3 lean meat, 1-1/2 fat.

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  • Tamara
    Jul 19, 2020

    The quantities listed for the marinade are way off. One cup of cilantro with less than a cup of liquids? The cilantro absorbs all the liquids and you have a cilantro paste with red onions. I bought a bag of key limes and used all but 6 for the juice. The other 6 were halved and put in with rest of marinade as instructed. There was about 1/2 cup key lime juice and I used it all, 1/2 cup white wine vinegar, and 1/3 cup olive oil. I used about a 1/2 Tbsp or more of cilantro. I used 1 small red onion. My steak is marinating now, can’t wait to try it, mouth is watering.

  • Remenec
    Aug 2, 2019

    Great flavor combinations in this recipe! I will definitely make this again!

  • hamza
    Jul 27, 2019

  • hamza
    Jul 27, 2019

  • randcbruns
    Jun 1, 2019

    Amazing lime flavor. The key limes really add a great flavor, something a regular lime won't.