For a quick, tasty poached fish, assemble the following:
1 lb black cod fillet
6-10 thin slices of fresh ginger
a few lemon or lime wedges
Arrange the the ginger slices in a skillet big enough to hold the fish. Put the fish on top of the slices, skin side down. Set the citrus wedges around the fish. Pour just enough vermouth into the skillet to cover the bottom of the pan. Cover and put on simmer until fish is done, about 15 to 20 minutes.
Be sure to save the broth -- it's a great start to a soup.