Boil the buckwheat noodles in boiling water, then rinse under cold water.
Julienne the cucumber, carrot, and bell pepper thinly.
Boil the chicken breast and shred it for preparation.
Combine the cooked buckwheat noodles, vegetables, and shredded chicken breast in a bowl.
Mix soy sauce, vinegar, oligosaccharide syrup, and sesame oil to make the dressing.
Add the dressing to the salad and mix well.
Sprinkle with sesame seeds to finish.