Salmon and Dill Chowder with Pastry Crust

Name: Salmon and Dill Chowder with Pastry Crust
Ingredients: 1 sheet prepared frozen puff pastry dough (recommended: DuFour); 1 egg; 2 (6-ounce) skinless salmon fillets; Kosher salt and freshly ground black pepper; About 1/3 bottle (1 1/2 cups) dry white wine; 1 fresh bay leaf; 3 to 4 slices lemon; 1 tablespoon extra-virgin olive oil; 1 sweet onion, chopped; 3 to 4 small ribs celery, chopped; 1 large Idaho potato, chopped; 1 tablespoon crab boil seasoning (recommended: Old Bay); 2 cups chicken stock; 1 cup heavy cream; 2 tablespoons butter; 2 tablespoons all-purpose flour; 1 tablespoon Dijon mustard; 1/2 cup frozen peas, optional; 1/4 cup chopped fresh dill