Turkey Pot Pie with Sage Crust

Name: Turkey Pot Pie with Sage Crust
Ingredients: 1 (2 pound) boneless turkey breast; 4 cups chicken stock; 4 parsley sprigs; 1 bay leaf; 3 thyme sprigs; 3 black peppercorns; 2 large carrots, peeled and cut into 1/2-inch pieces; 1/2 pound turnips, peeled and cut into 1/2-inch pieces; 1/2 cup frozen peas, thawed; 3 tablespoons unsalted butter; 1 large leek, white and pale green part, sliced thinly; 1 large shallot, finely sliced; 5 tablespoons all-purpose flour; 1/2 cup dry white wine; 1 cup heavy cream; Salt and pepper; 1/4 cup coarsely chopped parsley; 2 tablespoons fresh sage chiffonade; 2 1/2 cups all-purpose flour; 2 tablespoons chopped fresh parsley; 1 tablespoon chopped sage; 1 tablespoon chopped rosemary; 1 tablespoon chopped thyme; 1 teaspoon salt; 1/2 cup chilled unsalted butter, cut into 1/2-inch pieces; 1/2 cup chilled solid vegetable shortening; 1/2 cup ice water