Light the charcoal in a charcoal chimney or mound inside your grill and let burn for 10-15 minutes.
While the coals are burning, rub the olive oil, sea salt, and pepper all over the skirt steak.
Spread coals evenly over the grill while placing a hand full of Mesquite Wood Chunks on top. Let burn for another 5 minutes.
While waiting for the grill, place all of the chimichurri ingredients into a bowl and mix thoroughly.
Place steaks on grill and let cook for 3 minutes on one side and 2 minutes on the other side for medium rare. Keep the steak on 3 minutes per side for medium.
Pull steaks off grill and let rest for 10 minutes.
Cut the steak against the grain of the beef.
Place some chimichurri on top and enjoy!