Step 1

Using sharp knife, lightly score the steak about 1/8 inch deep on both sides in a crisscross pattern at 1/2-inch intervals.

Step 2

In a small bowl combine the cumin, garlic powder, oregano, freshly ground pepper and kosher salt. Season both sides of the steak with season spices.

Step 3

For the chimichurri, combine the red onion, vinegar, salt and olive oil and let it sit for about 5 minutes. Add the remaining ingredients. Mix all ingredients together. (Note: this tastes best when you chop the onions by hand rather than in a food processor, not sure why but trust me)

Step 4

Prepare the grill on high heat. Grill the steaks to desired doneness, about 3 to 4 minutes per side for medium-rare, turning steaks 1/4 turn after 1 1/2 minutes to form crisscross grill marks, if desired.

Step 5

Transfer steaks to cutting board; let rest 5 minutes. Thinly slice steaks across grain.

Step 6

Transfer to platter and top with chimichurri sauce.