Mix the egg, sugar and shiro-dashi in a small bowl.
Place some oil in a heated frying pan and pour in the egg. When it is half-cooked, move it over to one side of the frying pan, and shape it into a log.
Turn the heat to low. When it is browned, flip it over and cook the other side.
Place the cooked egg onto cling film. Wrap it up and fold over the edges. Remove it from the cling film after about 2 minutes and slice.
Story Behind this Recipe
I modified a recipe I saw in a magazine a few years ago.
Cook until lightly browned. If you wrap it loosely, the shape won't take hold, so wrap it up quite tight. I use about 15 cm of a mini size cling film. If the egg is still soft, microwave for about 10 seconds, still in the cling film.