Remove water from the squid well, sprinkle salt, peppe and flour, shake off excess.
Heat the vegetable oil in a pan, stir-fry ginger and crushed red pepper with low heat. Add squid, celery, cucumber and cook for 1~2 mins over high heat. Add seasonings marked with * and keep stir-frying until the flavor blended.
To finish it off, pour sesame oil from the edge of the pan to inside of it, stir once.