
Hiyajiru is a refreshing Japanese cold miso soup made with sesame, tofu, cucumber, and fragrant shiso. Light, savory, and easy to prepare, it is especially delicious poured over a bowl of warm rice on a hot day.
Grind the roasted sesame seeds in a mortar and pestle or spice grinder until finely crushed. Add the miso, bonito dashi stock, and iriko dashi granules, then mix into a smooth paste.

Pour in the boiling water and stir well until the miso mixture is fully dissolved and smooth. Let the broth cool for a few minutes.

Thinly slice the cucumbers. Crumble the firm tofu into small bite-size pieces, then add both to the cooled broth.

Add the ice and stir until the soup is thoroughly chilled. Taste and adjust with a little extra ice or water if you prefer a lighter broth.

Stack the shiso leaves, roll them tightly, and slice them into thin ribbons. Stir them into the soup or scatter them over the top just before serving.

Serve immediately once the soup is cold, or refrigerate briefly for an even cooler finish. Traditionally, hiyajiru is enjoyed poured over warm rice.

If green shiso is hard to find, try a small amount of fresh mint and basil for a different but refreshing flavor. Use English cucumber if preferred, and drain the tofu well so the soup does not become watery. The soup can be chilled in the refrigerator for up to 1 day, but add the shiso just before serving for the freshest taste.