INGREDIENTS   Small octopus (about 8 oz) : 2  Onion : 1 stalk  Green onion : 5 stalks  Green pepper : 2  Red pepper : 2  Hot pepper powder : 1/2 tb  Hot pepper soypaste (kochu-jang) : 2 tbs (available in Korean stores)  Soy sauce : 1 tb  Sesame oil : 1/2 tb  Sugar : 1 ts  Ginger juice : 1/2 ts  Sesame seed, roasted : 1 ts  Salad oil : 1 tb  Salt    METHOD      Trim the small octopuses; cut off entrails and eyeballs, careful not to break the sac. Scrub the octopuses with salt and rinse them under flowing cold water. Cut them 2 inches long by 1/2 inch wide. Boil them slightly.  Cut onion, green onions, and peppers into 2 inch strips.  Combine hot pepper powder, hot pepper soypaste, soy sauce, sesame oil, sugar, ginger juice, and salt in a bowl. Add the boiled octopuses, then mix them well.  Heat the salad oil in a skillet, stir-fry the vegetables until almost done. Put the mixture in the pan and stir-fry it quickly again.  When serving, sprinkle roasted sesame see...