STEP 5/6
When it boils up, change the heat to low heat, boil it until the ginger is fully cooked, and at the last step, turn off the gas oven, leave it for a minute or two, and strain it through a sieve to separate the ingredients from the soy sauce.
Tzuyu has been made. You can cool it down now.
You can make tsuyu and put buckwheat noodles in it, or you can put it in braised tofu in general.