For the Chimichurri Sauce: place the Mazola Corn Oil, fresh parsley, fresh cilantro, garlic cloves, oregano, white wine vinegar, salt, black pepper, and red pepper flakes in a food processor. Blend for 10 seconds. Then pulse until desired consistancy (about 2-5 pulses depending on food processor). *You don't want it to be pureed but want to be able to recognize that theirs herbs in the sauce.
Place the skirt steak in large glass dish. Pour half the chimichurri sauce on top of the steak. Massage the sauce all over the top and bottom of the steak. Cover with a lid or plastic wrap and refrigerate for 8-12 hours. Reserve the remaining sauce in a container fitted with a lid.
Once the steak is marinated, preheat the grill to 450 degrees Farhenheit. Pat the steak dry of the marinade. Spray the grill with a non-stick grilling spray. Lower the heat to medium-low. Place the steak on the grill. Grill for 5 minutes, turning once and grill another 3-5 minutes. Skirt steak is best served medium-rare to medium at the very most.
Remove the steak from the grill. Let it rest for 5-10 minutes. Thinly slice against the grain of the steak. Divide evenly among plates and enjoy with additional chimichurri sauce on top.