Mix the first 7 ingredients in a bowl, make sure the corn starch is dissolved completely. If the mixture is too thick, thin with water. Stir & set this aside for about 15 minutes for the flavors marry.
Add the beef in the mixture to marinate, making sure all the surface of the beef is coated. Cover and place in the refrigerator for 30 min. to an hour.
In a pan, heat up the cooking oil on high and fry the strips, making sure they are spaced away so as not to stick with each other. The frying process shouldn't be long, but just enough to cook the coating -- leaving the beef underneath medium rare and juicy.
Skim the cooked beef from the pan and finish with a dash of soy sauce and white pepper to taste. Drizzle thinly with dark sesame oil and sprinkle with spring onions & toasted sesame seeds. Best served as toppings for white steamed rice or stand alone as an appetizer.
