1 1/2 lb. Unpeeled medium shrimp 1 lb. Crab meat 1 7-ounce package thin spaghetti 1 tsp. Oil 1/2 cup (1 stick) butter plus 1 Tbs. 1/2 cup chopped onion 1 cup finely diced celery 1/2 cup flour 2 cups chicken broth 1 cup whipping cream 6 ounces shredded Swiss cheese 1/4 cup dry sherry [...]