Jangjorim is a banchan that doubles as a fridge staple: beef simmered until tender, torn into strands and braised in soy, sugar and mirin with soft-boiled eggs sitting in the same liquid.
Tear the beef rather than slicing it. The ragged edges soak up far more of the braise, and the dish is meant to be pulled apart with chopsticks a few strands at a time, not served as slices.