Let it simmer until it's sweet and delicious. Since this is also low calorie, I recommend it for those who are dieting. You can easily make this using a frying pan.
I love boiled and seasoned tofu. I always pay attention to my calorie count, so I simmered it instead of frying it, and it turned out really delicious.
Since it's just simmered, you can leave it alone. I like eating this while it's warm, but I also enjoy it cooled too.
Enjoy Japanese food around the world.