「PREP」If using dried wakame, soak in water for 10 minutes to reconstitute. If using fresh wakame, rinse off (fresh wakame is usually sold covered in salt) and soak for a couple of minutes.Rinse the cucumbers, rub salt into them, then roll on a cutting board (as if using a rolling pin) and rinse again to remove the salt. This is to help prevent the bright green of the cucumber from darkening.
Cut the wakame into bite-sized pieces. Thinly slice the cucumber. (If not using Asian cucumbers, which are usually seedless, cut in half lengthwise, scoop out the seeds, then thinly slice into half-moons.)
Place the sliced cucumbers in a bowl, sprinkle with salt and set aside for 5-10 minutes.
Combine the dressing ingredients in a bowl and mix well, then add the cucumber and wakame. Mix and let rest for a few minutes, top with some grated ginger to taste, and serve.