The short ribs are cut thinly so they will cook quickly on the grill. They are a staple at Korean BBQ restaurants where you cook your own meat on a hibachi in the center of the table. You can find this cut of short rib at your local Asian market or ask your butcher to cut them for you.
When you stir fry be sure you turn up the heat! It is a quick cooking process that should only take a few minutes. It is perfect for those week nights that you just don't want to spend a whole lot of time in the kitchen.