Chop the green onion and slice the onion.

Rub the octopus with coarse salt to clean it thoroughly.

Blanch the octopus briefly in boiling water, then immediately cool it in ice water.

Cut the octopus into bite-sized pieces.

Heat a pan with ample cooking oil and stir-fry the green onion to create scallion oil.

Add the sliced onion and stir-fry until softened, then mix in all the seasonings except sesame oil and sesame seeds.

Add the blanched octopus, sesame oil, and sesame seeds, and stir-fry quickly over high heat until the flavors meld.