Slice the beef across the grain into thin strips. Put the beef strips into a gallon ziplock bag and add the marinade and close bag. Squish the marinade into the beef and let sit for 30 minutes. Then add the 1 1/2 tbsp. oil, squish around again and let marinate another 30 minutes.
While beef is marinating, prepare the onions. Wash and slice all the green onions lengthways, then into 2 inch pieces. Mince garlic.
Mix together the sauce ingredients and set aside. When the beef has finished marinating, heat the wok and add 1 cup of oil. When oil is 350 degrees carefully slide the beef strips into the wok. About 7 pieces at a time. Fry until the beef changes color and browns a bit. Remove from oil and drain on paper towels. When all the beef is cooked pour out all the oil into a pyrex safe dish except for 2 tbsp. When it's nice and hot again stir-fry the garlic and green onions. Takes about 2-3 minutes.
Before the onions are all the way cooked push them up to the sides of the wok and add the sauce. Stir until thick about 1 minute. Then add the beef and stir all together.
Follow the directions to fry the Maifun noodles. Serve the Mongolian Beef on top of the noodles or sticky rice.
Nonstick Wok (purchase at Sur La Table) This would work wonderfully for this recipe if you don't already have a wok.
Of course this is the one I really want! Calphalon Wok (purchase at Chefs Catalog)