Drain and rinse a can of whelks. Cut into chunks and transfer to a bowl.
In the same bowl with the whelks, add cucumber, carrot, onion, pepper, and scallions.
To make the sauce, combine gochugaru, gochujang, sugar, vinegar, sesame oil, and minced garlic. Stir and mix well.
Bring a pot of water to boil over medium high heat. Add the noodles and cook according to the package instructions.
When the noodles are done, drain and rinse in cold water.
Serve immediately!