Cut pork into long thin strips (about 1-½ inches long). Marinate with soy sauce, cornstarch and cold water. (Use your fingers or chopsticks to mix until thoroughly combined).
Put the shredded scallion on a plate.
Heat oil in frying pan to 300°F. Add pork strings and stir fry for 15 seconds until done. Remove and put aside. Drain off oil from the pan.<