Boil the acorn noodles in boiling water.
Rinse the boiled acorn noodles in cold water and drain well.
Julienne the cucumber and carrot, and slice the lettuce into bite-sized pieces.
Mix together the sauce ingredients (gochujang, soy sauce, vinegar, sugar, sesame oil, and minced garlic).
Add the acorn noodles and assorted vegetables to a bowl and pour the sauce evenly over them.
Mix well, serve on a plate, and sprinkle sesame seeds on top to finish.