Let steak stand 30 minutes at room temperature. Sprinkle steak with 1/2 teaspoon pepper and salt.
Preheat grill to high heat.
Place garlic in food processor; process until minced. Add parsley, cilantro, and mint; process until coarsely chopped. Add oil, next 3 ingredients (through capers), and remaining 1/2 teaspoon pepper; process until finely chopped.
Place steak on grill rack coated with cooking spray. Grill 2 minutes; turn steak over. Grill 2 to 3 minutes or until desired degree of doneness. Let stand 5 minutes. Cut steak across grain into thin slices. Serve with sauce.
Kids Can Help: Like with most of my sauces, kids can do practically all the work. They can pick the stems off the herbs or use a child-safe knife to cut them. Kids can also measure out all the ingredients and dump them directly into the food processor.
very simple to make and the chimichuri sauce really brightened up the dish. The sauce had just the right amount of tang to it to compliment the skirt steak perfectly. You could make this blind for guests and be proud. No way you could make a mistake, other than at the grill.
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