Clean the squid thoroughly and cut it into bite-sized pieces.
Slice the onion, carrot, and green onion into thin strips.
Prepare the sauce by mixing gochujang (Korean chili paste), red pepper powder, soy sauce, minced garlic, sugar, sesame oil, and pepper.
Heat oil in a pan and stir-fry the green onion to enhance its aroma.
Add the squid and vegetables and stir-fry quickly over high heat.
Add the sauce and stir-fry well until everything is evenly mixed.
When the squid is cooked, finish by adding sesame oil and sprinkling sesame seeds.