Trim any tough stems from the seaweed (Saebalnamul).

Rinse the seaweed under running water twice to clean it.

Prepare a vinegar water solution by mixing 1 tbsp of vinegar with water. Soak the seaweed for 1 minute to remove any residual pesticides.

Rinse the seaweed again under running water to remove the vinegar smell.

In a mixing bowl, combine 1/2 tsp plum extract, 1 tsp fish sauce, 1/3 tsp soy sauce, 2 tbsp chili powder, 2 tbsp vinegar, and 1 tbsp water. Let the mixture sit for 5 minutes to soften the flavors.

Julienne the carrot and thinly slice the onion.

Combine the prepared vegetables and seaweed in a mixing bowl. Add the seasoning mixture and gently toss to coat.

Finish by adding 1 tbsp sesame oil and 1 tbsp sesame seeds. Mix gently to combine.