This is another popular dish at Izakaya (居酒屋). For this dish use thinly sliced beef, that is why cooking time is very short for this dish, do not have to cook beef that much. If beef is not thinly sliced then need in improvise cooking of this dish.
In a pot brown thinly sliced beef with oil. Since beef is thinly sliced, beef will be cook fast, once beef is brown in color then that is it.
Then add onions, potatoes, and shirataki (しらたき, Japanese semi-transparent yam noodles). Recommend cutting shirataki noodles to shorter before adding to the pot. Add sake (酒, Japanese rice wine) and stir the content once or twice.
Then add sugar and soy sauce. Let it simmer. All you need to do is cook potatoes, which will be 10 min. or so. Beef is thin slice so it does not take time to cook. At the end add Naga-negi (長ネギ. Japanese large green onion (scallion)) . Simmer just a minute after addition of Naga-negi.
Dish is done! It is easy dish. Can keep in refrigerator for few days and warm it in a microwave oven for easy dish!