In this task, you have to generate the title of the recipe given its required ingredients and directions.

ingredients: '6 medium red potatoes', '1 stick margarine', '1 small onion', 'salt', 'pepper', '2 1/2 c. milk',<sep> directions: 'Peel and cube potatoes into small pieces.', 'Boil potatoes along with salt, pepper and chopped onion in just enough water to cover potatoes.', 'When tender, add milk and simmer until thick.', '(More or less milk may be needed.)'
Potato Soup