Put all the ingredients in a saucepan. (If you can't put them in all at once, do it later when the vegetables go down in volume.)
Add the seasoning ingredients.
Once it starts bubbling and the vegetables have wilted, add the beef and cook over high heat.
When the beef is cooked, it's done!
Story Behind this Recipe
My mother used to make this often, so I tried to recreate it in my own way!
Adjust the amount of sugar to taste. I used shimeji mushrooms instead of shiitake mushrooms this time. You can also replace them with enoki mushrooms or king oyster mushrooms. The seasoning might be on the strong side, so you can add some water if you're serving it to children.