Clean and prepare squid for Onao.
Cut onions, green onions, garlic, and other ingredients into bite-sized pieces.
Heat cooking oil in a pan and sauté garlic and green onions to release their aroma.
Add squid and onions, then stir-fry over high heat.
Add and mix seasonings such as gochujang (Korean chili paste), soy sauce, sugar, and red pepper powder.
Stir-fry until all ingredients are cooked and the seasonings are well absorbed.