Julienne the cucumber, carrot, and scallions.
Boil the chicken breast and shred it into small pieces.
Prepare the bibim sauce.
Cook the noodles, rinse in cold water, and drain thoroughly.
Mix the noodles well with the bibim sauce.
Top with vegetables, chicken breast, and crushed peanuts.
Drizzle with sesame oil and sprinkle with toasted sesame seeds.