Bring a large pot of water to boil.
Blanch spinach for 1 minute.
Drain spinach and rinse under cold water. Set aside while you prepare the goma ae.
In a mortar and pestle, grind the white sesame seeds until they resemble coarse sand (it doesn't need to be a paste).
Add sugar, miso, and soy sauce to the sesame seeds and mix to combine.
Squeeze out the excess water from the cooled spinach (don't burn yourself!).
Mix spinach and goma ae together. Refrigerate until ready to serve.
