You will be given a definition of a task first, then some input of the task.
In this task, you have to generate the title of the recipe given its required ingredients and directions.

ingredients: '3 large russet potatoes, peeled and diced', '1/2 white onion, diced finely', '2 teaspoons butter', '1/3 cup sour cream', '1/3 cup Cheese Whiz', '1/3 cup mayonnaise', 'salt and pepper', '1/2 cup cheddar cheese, grated',<sep> directions: 'Place potatoes in a large pot, cover with water and boil until fork tender.', 'Preheat oven to 350 degrees.', 'Sautee onion in butter until browned.', 'Once potatoes are tender, drain and mash with onion, sour cream, cheese whiz, mayonaise, salt and pepper.', 'Place mixture in oven-safe casserole and cover with cheese.', 'Bake until heated through and cheese is melted.'
Output:
Twice Baked Potato Casserole