Add some mojo de ajo in the mayonnaise for your sandwiches for extra flavor.
Place the skirt steak in a baking dish just large enough to hold the skirt steak in an even layer. Sprinkle the skirt steak with Kosher Salt on both sides, about ½ teaspoon total, possibly a pinch more.
Separate the oil from the solids of the Mojo de Ajo and pour about 1/3 cup over the skirt steak. Turn the steaks over and rub them with the oil to get and even coating. Cover the pan with plastic wrap and let the skirt steaks rest for 30 minutes at room temperature.
Prepare your grill. Oil the grill once the coals are in place.
Place the skirts steaks on a 45° angle over the grill and sear for 2 minutes. Rotate the steaks towards the opposite 45° angle and grill for one minute. Turn the skirt steaks over and repeat on the other side. If you have a thicker piece of skirt steak try 4 minutes side. The steaks could be done anywhere from 5-8 minutes depending on how thick they are.