Trim fat from steaks as needed, and cut into 1-2 inch cubes.
In a bowl, toss cubed steak with EVOO until it is well coated, set aside.
Cut onions into chunks that are approximately the same size as the steak cubes.
In a separate bowl, gently toss the onion cubes with EVOO so that they as well are well coated.
Thread steak and onion onto skewers, alternating steak and onion.
Once skewers are ready for the grill, crack pepper over them, turning to make sure that they are evenly coated. Sprinkle sea salt liberally over skewers. Heat grill to 450 degrees.
Grill skewers to desired level of done. But for the love of all that is holy, if you're going to grill them to well done, grab a shoe that is close to you and start gnawing on the sole, it'll save you both time and money, and get you essentially the same thing.
Enjoy!