Toast your sesame seed for a few minutes in the pan. Then take them of leave them to cook down.

Grind half of the toasted sesame seeds with a mortar and pestle. Leave some sesame seeds unground for some texture and garnish.

Add soysauce, mirin, sugar sake and grounded sesame together. Leave it aside.

Put lightly salted water in a large pot and bring to boil. Once boiling, add the spinach in and cook for 30-45 seconds. Remove the spinach from the water and soak in iced water to stop cooking then squeeze water out.

Add the sesame sauce and toss all together. Serve at room temperature or chilled. This is perfect as a side dish and goes well with rice and omelette roll or Tamagoyaki.