Clean the squid thoroughly and cut it into bite-sized pieces.
Slice the onion, carrot, green onion, and garlic and prepare them.
Make the sauce using gochujang (Korean chili paste), soy sauce, sugar, red pepper flakes, minced garlic, and pepper.
Heat cooking oil in a pan and sauté the garlic until fragrant.
Add the squid and vegetables to the pan and stir-fry over high heat.
Add the sauce and stir-fry until all ingredients are well combined.
Taste and adjust seasoning if needed.
Garnish with sesame seeds and green onion to finish.