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Make the Flank Steak by combining olive oil, soy sauce, minced garlic, molasses, ginger, mustard, and Worcestershire sauce in a resealable bag.
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Add flank steak to marinade and seal bag,
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Place bag in refrigerator and allow steak to marinade overnight.
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The next day, approximately 40 minutes before you are planning to eat:
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Make the chimichurri sauce by placing 4 cloves of garlic in the bowl of a food processor and pulsing until minced.
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Add the parsley, cilantro and basil to the food processor and process until a paste.
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Add rice wine vinegar, salt, pepper, Tabasco sauce to the processor and pulse to combine.
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Slowly add 1/2 cup of extra-virgin olive oil to food processor with motor running to form the sauce.
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Transfer sauce to a jar.
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Heat your grill.
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Take flank steak out of the refrigerator and allow to warm up on the counter for 10-20 minutes.
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Grill steak 6-8 minutes per side, depending on how well done you like your meat.
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Remove steak from grill and allow to sit for 10 minutes
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Slice steak against the grain.
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Serve sliced flank steak drizzled with chimichurri sauce.