Bring a large saucepan of water to the
boil and add noodles. When water returns to the boil add 1 cup
cold water. Bring to the boil again and cook until the noodles
are just tender. This does not take long, about 2 minutes, so
keep testing and stop cooking as soon as they are tender enough to
bite. Drain in a colander and hold under running cold water
until they are quite cold. Drain well. Toast sheet of nori
over gas or electric burner or under griller until crisp. Put
noodles on plates and crumble the nori over. Mix ginger with
scallions and put a small portion on each plate. Pour dipping
sauce into individual sauce dishes for each person. The ginger
mixture is stirred into the sauce and the noodles are dipped in the
sauce before eating.
Dipping sauce:
Put ingredients into a small pan and
bring to the boil. Remove from heat and cool. Taste and
add salt or sugar as desired.