If you are going to marinate your meat, mix up your marinade and pour over top of the skirt steak in a casserole dish or in a plastic bag. Marinate for 30 minutes or up to 24 hours. If you are not using a marinade, brush a little olive oil over the surface of the skirt steak and simply season with sea salt and cracked black pepper.
Heat your grill to a high heat of 450-500℉ or heat your grill pan on the stove over high heat.
Place your skirt steak on the hot grill and grill for 3-5 minutes on each side.
After grilling, allow the meat to rest for 5 minutes.
Using a sharp slicing knife, slice the steak against the grain into thin slices.