My mother used to make this for me when I was living back home before getting married.
She would usually season it with soy sauce and mirin, but when I made this variation with yakiniku sauce, my kids loved it. I've been making this with yakiniku sauce ever since.

It looks prettier if you wrap up the chikuwa so that the inside white part faces out.
When you're making this for bentos, you can cut down time in the morning if you work until step 4 the night before. For 4 servings. Recipe by sumirenohana