"Back in the Middle Ages fish pies were often made into the shape of the fish being eaten such as lobster, crab, salmon or carp and the crust embellished with elaborate pastry scales, fins, gills, and other details." --From Shakespeare's Kitchen by Francine Segan
Preheat the oven to 375° F.
Roll out slightly less than one-half of the dough into a 5- by 13-inch rectangle about 1/4 inch thick and place on a parchment-lined baking sheet.
Place the artichokes down the center of the crust.
Sprinkle the salmon with the salt and pepper and place on top of the artichokes. Arrange the oysters, asparagus, grapes, and coarsely pistachios over the salmon.
Roll out the remaining dough into a 5- by 13-inch rectangle and place on top of the ingredients.
Trim the dough into the shape of a fish and pinch the edges to seal. Using the excess dough, add fish details, such as an eye or fin. Using a teaspoon, imprint scale and tail marks on the dough, being careful not to cut through the dough.
Brush with the egg.
Bake the salmon for 40 minutes, or until golden brown. Serve with lemon wedges.