Jap-chae is one of the Korea's representative dishes made of dang-myeon(Sweet potato noodles) and other vegetables such as carrot, onion, spinach and mushroom. Sometimes fried egg, fried meat and sesame is added as well. There's no specified ingredients but can be varied according to in-season vegetables.
From long time ago, Jap-chae is loved dish for national holiday, birthday and family gathering, etc. Actually, Jap-chae requires quite long time to prepare because each vegetables should be sliced. If you feel lazy to prepare at home, why don't you try in a restaurant near your place?:)