An interesting dish, but probably not the best choice as a main meal. You can easily cook this at home. For that purpose, you might want to try it in a Korean restaurant. This is similar to Chow Mein that you can find in Chinese restaurants, but made with semi-transparent starch noodle, which is combined with beef, mushrooms, green onions, carrots, spinach, egg, etc. You may notice the flavor of sesame oil.
Sesame oil is to Korean dishes what olive oil is to Italian dishes.
I like Jab Chae, but it probably is not the best choice as a main meal in a restaurant. But I know since when. The red pepper, which originated from the New World, was first introduced to the Japanese by Portuguese sailors. Then it became known to the Koreans during a lengthy war between Korea and Japan that took place in the 16th century. While red pepper never became a favorite in the Japanese cuisine, Koreans loved it, and it has become an essential ingredient in many dishes since.