Boil the soy protein noodles in boiling water for 5 minutes, then rinse them in cold water and drain well.
Julienne the cucumber and carrot, and thinly slice the onion.
In a bowl, mix gochujang, soy sauce, vinegar, minced garlic, and oligosaccharide to make the sauce.
Combine the cooked soy protein noodles, vegetables, and sauce, and mix everything evenly.
Transfer to a bowl and finish with a sprinkle of sesame seeds.