Slice the cucumbers as thinly as possible.
Add 1 T of salt to the sliced cucumbers and let them sit for about 30 minutes to draw out moisture.
Squeeze the salted cucumbers firmly to remove as much liquid as possible.
Add the peeled perilla seed powder and perilla oil to the squeezed cucumbers.
Mix everything well, adjusting the seasoning with a little extra salt if needed, until it becomes creamy.
Finish by sprinkling toasted sesame seeds on top, and it's ready to serve.