Prepare the onion, squid, and other ingredients.
Cut the squid into bite-sized pieces.
Heat oil in a pan and stir-fry the onion, squid, and green onion.
Add seasonings such as gochujang (Korean red chili paste), red pepper powder, soy sauce, and sugar, and stir-fry.
Stir-fry until the vegetables and squid are cooked.
Finish by sprinkling sesame seeds on top.