Gravlax with Mustard Sauce

TO MAKE THE GRAVLAX: Ask the fish dealer to cut the salmon in half, remove the backbone and small bones, and leave the skin on.

In a glass or enamel rectangular dish, set half of the salmon, skin side down. Place the dill over the fish. In a small mixing bowl combine the salt, sugar and pepper, then sprinkle this mixture evenly over the dill. Set the other salmon half, skin side up, over the dill.

Cover the fish with plastic wrap and on it, place a baking sheet which is larger than the dish which contains the fish. Set weights, such as heavy cans, on the baking sheet and refrigerate the salmon for up to 3 days, turning the fish over every 12 hours and basting it with the liquid which accumulates in the bottom of the dish. After basting replace the weights each time.

TO FINISH AND SERVE: Remove the salmon from the marinade and discard the dill and seasonings. Pat the fish dry and set it skin side down on a cutting board. Cut wafer thin slices on the diagonal and away from the skin. Serve with a mustard sauce.

TO MAKE THE MUSTARD SAUCE: In a medium bowl, combine all of the ingredients and blend thoroughly. Cover the sauce and place in the refrigerator for at least 2 hours before serving. Before serving, beat with a whisk or fork.