Yook Gae Jang - ???

Note: You can add the egg directly into the soup. I live with a man who absolutely detests eggs, so I tend to always make any eggs "on the side". I made Yook Gae Jang today. I bought all the ingredients earlier in the week, but didn't have time until today to make it. Here's a grocery list of what you need: Beef flank steak (anywhere from 1.25-2 lbs. of it) Bean sprouts