Choose 4 bowls or shallow small casseroles to serve in and use one of them as a template to cut out 4 pastry pieces the size and shape of your serving dishes. Use a sharp paring knife to work around your dish. Arrange the pastry on a nonstick baking sheet or on a parchment paper-lined baking sheet. Beat the egg with a splash of water and brush the dough with egg wash. Bake for 10 to 12 minutes, or until deeply golden and puffed.
Meanwhile, season the fish with a little salt and pepper. Place the salmon in a small skillet with the wine, just enough to come up to the top of the fillets. Add the bay leaf and lemon slices. Bring the fish to gentle boil, lower the heat, and then simmer for about 8 to 10 minutes, or until opaque.
While the fish poaches, in a medium Dutch oven over medium-high heat, heat the extra-virgin olive oil. Add the onion, celery, and potatoes. Season with salt, pepper, and crab boil seasoning. Cover and sweat the vegetables for 8 minutes, stirring occasionally.
Turn off the heat under the salmon. Remove the salmon to a dish and flake it up. Strain the broth and reserve about 1 to 1 1/2 cups.
Add the chicken stock, reserved fish stock, and cream to the vegetables. While it comes to a boil, make a roux in small skillet. Melt the butter, and then whisk in the flour. Add the stock and whisk for 1 minute. Stir in the Dijon. Add the roux to the soup and cook for about 3 to 4 minutes to thicken the chowder to the consistency of loose gravy.
Add in the peas, flaked salmon, and dill and heat through. Serve in individual dishes topped with pastry tops.