Heat the water with dashi over medium-high heat for 1-2 minutes
Dilute the miso in a small ladle before incorporating it into the broth. The goal here is to prevent the miso paste from sticking to the bottom.
Add the tofu cubes
Add the wakame
Add the mushrooms, let cook for at least 3 minutes
As soon as the wakame seaweed is rehydrated, pour the broth into a small bowl and garnish with green onions
Notes
To preserve all the nutritional and probiotic properties of Miso, do not heat the paste above 80°C (176°F). Turn off the heat when the water starts to simmer, and it's preferable to add the miso paste at the end of cooking.