Pumpkin and Shrimp Bisque

Name: Pumpkin and Shrimp Bisque
Ingredients: 1 pound large shrimp (16 to 20); 2 tablespoons extra-virgin olive oil; 3/4 cup dry white wine; 3 cups homemade or canned low-sodium chicken stock; Pinch saffron threads (about 24); 2 ribs celery, coarsely chopped; 1 medium onion (about 8 ounces), coarsely chopped; 4 fresh bay laurel leaves, torn, or 2 dried; 3 3-inch springs fresh sage; 2 cups pumpkin purée, fresh (see Note) or canned; 1/2 cup heavy cream; About 3/4 teaspoon salt, less if using canned stock; Scant 1/8 teaspoon cayenne pepper; 1 tablespoon freshly squeezed lemon juice; Freshly ground black pepper; 1 tablespoon extra-virgin olive oil; 2 teaspoons finely chopped fresh sage