Clean the squid thoroughly and cut it into bite-sized pieces.
Slice the onion, green onion, and carrot into thin strips.
In a bowl, mix gochujang (Korean red pepper paste), soy sauce, minced garlic, sugar, and chili powder to make the seasoning sauce.
Marinate the squid and vegetables in the sauce for about 10 minutes.
Heat cooking oil in a pan over medium heat and stir-fry the marinated ingredients.
When everything is cooked, sprinkle with sesame seeds to finish.