Cut the acorn jelly into bite-sized pieces.
Julienne cucumber, carrot, and perilla leaves.
Mix the sauce ingredients (soy sauce, chili powder, minced garlic, sesame oil, vinegar, sugar, sesame seeds).
Place the vegetables and acorn jelly in a bowl, add the sauce, and gently toss together.
Transfer to a plate and add extra sesame seeds and sesame oil on top.