When I have tons of Shiso leaves, here is what I do to preserve them! Simply eat them with freshly cooked steamy white rice. Check out my previous posts if you have some Shiso seeds. Salted Shiso Seeds Soy Sauce Based Preserved Shiso Seeds Salted Shiso Leaves · some Shiso leaves · some salt 1. Pluck the Shiso leaves one by one from the stalks. 2. Wash the leaves carefully one by one with water to clean out the dirt. 3. Pat dry well using paper towel. 4. Preserve by placing few leaves in a container and sprinkle some salt. Repeat this with the remaining leaves.