In a small bowl, whisk together the gochugaru, green plum extract, soy sauce, sesame seeds, minced garlic, corn syrup, and perilla oil until well combined.
Thinly slice the onion and carrot into fine strips for a refreshing crunch. Chop the lettuce into bite-sized pieces.
Gently slice the acorn jelly into bite-sized cubes. Be careful not to mash the jelly, as it’s delicate.
In a large bowl, combine the acorn jelly, onion, carrot, and lettuce. Drizzle the seasoning sauce over the ingredients and gently toss until everything is evenly coated.
Transfer the salad to a serving plate. For extra flavor, sprinkle with a bit more sesame seeds or a light drizzle of perilla oil. Enjoy immediately!