Clean and prepare the squid, then cut it into bite-sized pieces.
Julienne the onion, carrot, and green onion.
In a bowl, mix gochujang (Korean chili paste), soy sauce, sugar, minced garlic, red pepper powder, and sesame oil to make the seasoning sauce.
Heat cooking oil in a pan and stir-fry the green onion to infuse flavor.
Add the squid and vegetables, then stir-fry over high heat.
Add the seasoning sauce and stir-fry quickly.
Finish by sprinkling sesame seeds on top.