This is part of a traditional Argentinean Asado (BBQ). It couldn't be easier to make this skirt steak. This is an extremely tasty and juicy cut of beef. Often, the fatty membrane is removed to make the meat more tender, but go ahead and leave it on - your steak will be more juicy as it acts like a shield to keep the juices in while cooking. Serve with a simple salad of lettuce, tomato, and onions dressed with a light vinaigrette and with chimichurri (my favorite is recipe #381098).