Detailed Instructions: In this task, you have to generate the title of the recipe given its required ingredients and directions.
Q: ingredients: '1 tablespoon butter', '1 celery rib, chopped', '1 carrot, chopped', '1 1/2 cups chicken stock', '1 teaspoon dried thyme', '1 bay leaf (laurel)', '20 -24 scallions, trimmed of all but about 1 inch of the green tops', '1/2 cup heavy cream', '1/4 cup Dijon mustard', 'salt & freshly ground black pepper',<sep> directions: 'Heat the butter in large skillet over medium heat.', 'Saute celery and carrot until lightly browned, and soft, about 15 minutes.', 'Add the chicken stock, thyme, and bay leaf.', 'Simmer all, covered, for 15 minutes.', 'Add scallions and simmer uncovered for 5 minutes--do not overcook.', 'Remove scallions with a slotted spoon and set aside.', 'Strain the liquid in a fine sieve, discard the solids, and return 1/2 cup of liquid to the skillet.', 'Stir in cream and mustard and simmer uncovered, stirring occasionally, until the liquid has reduced to about one third, about 10 minutes.', 'Season with salt and pepper to taste, and return the scallions to the skillet long enough to heat them through, about 1 minute.', 'Serve immediately.'
A:
Scallions With Mustard Sauce