SOAK THE NOODLES in a large bowl of warm water for 15 minutes. When they
are soft, drain them and discard the water. Cut them into 3-inch lengths
using kitchen scissors or knife. Put 1 tablespoon of oil into a hot wok or
pot, then add the scallions and garlic and stir-fry quickly for a few
seconds. Add the meat and stir-fry until it is cooked. (This should take
between 5 and 10 minutes.) Then add all the sauce ingredients, except the
sesame oil and cook the mixture over a gentle heat for about 5 minutes. Now
add the drained noodles and sesame oil and cook the mixture for a further 5
minutes. Ladle some noodles and sauce into individual bowls or into one
large serving bowl, and serve at once.