Definition: In this task, you have to generate the title of the recipe given its required ingredients and directions.
Input: ingredients:  '4 leeks', '2 onions, peeled', '2 carrots, broken into a few pieces', '4 ribs celery', '4 cloves garlic', '6 black peppercorns', '1/2 teaspoon kosher salt', '4 tablespoons butter', '3 large leeks, about 2 1/2 pounds', '4 large potatoes, cut in 1/2-inch dice', '3 golden beets, peeled and cut into 1/4-inch dice (about 3 cups)', '1 pound fresh lima beans, shelled to make 1 cup', '3 zucchini, about 1 pound, quartered lengthwise and cut crosswise in 1/4-inch slices', '2 heads green-leaf lettuce, shredded', '2 cups sorrel', 'Greens from 3 beets, chopped', '3/4 cup dill-pickle juice', '1/4 cup fresh dill, minced', '1/4 cup white vinegar', '2 tablespoons kosher salt and freshly ground black pepper to taste', '1 1/2 cups sour cream',<sep> directions: 'For the stock, wash the leeks by trimming their ends, slicing them lengthwise in quarters and separating and rinsing each layer under cold water.', 'Put them in a large pot along with the other ingredients, cover with 6 quarts of water and bring to a boil.', 'Reduce the heat and simmer for 2 1/2 hours, until only a 1/2 gallon of liquid remains.', 'Remove from the heat, strain and discard the solids.', 'For the soup, melt the butter in a large pan.', 'Wash the leeks thoroughly; trim so only the white part remains; julienne and soften them in a large pot over medium-low heat, stirring, about 5 minutes.', 'Stir in the potatoes and cook for 5 minutes.', 'Add the beets and continue to cook, stirring, 5 minutes; then add the lima beans and cook 5 minutes more.', 'Add the zucchini, lettuce, sorrel and beet greens, cover with the stock and bring to a boil.', 'Reduce heat, add 1/2 cup of the pickle juice and simmer until the potatoes are tender.', 'Add 1/8 cup of the dill and cool in the refrigerator.', 'Before serving, stir in the remaining 1/2 cup of pickle juice, the vinegar, salt, pepper and remaining dill.', 'Serve chilled with a dollop of sour cream in each bowl.', '(The borscht can be made several days ahead.)'

Chilled Green Borscht