Definition: In this task, you have to generate the title of the recipe given its required ingredients and directions.
Input: ingredients:  '7 medium potatoes, peeled, cooked and mashed', '1 (10 3/4 oz.) can cream of celery soup', '1 (8 oz.) carton sour cream', '1 1/2 c. grated sharp Cheddar cheese', 'salt and pepper to taste', 'diced onion to taste',<sep> directions: 'Wash and do not peel enough potatoes to feed your family. Slice thinly, we use slicer or cheese grater.', 'Put into frypan with enough shortening to cover bottom.', 'Add salt and pepper. Cook slowly until tender.'

Potato Casserole