You will be given a definition of a task first, then some input of the task.
In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Melt butter. Blend in flour and add milk, stirring constantly. Cook mixture until thick, boiling about 3 minutes. Add seasonings and grated cheese and cook slowly until cheese melts. Add cooked ham, potatoes and onions., Pour mixture into a greased casserole. Sprinkle with buttered bread crumbs and bake, uncovered, at 350 for 30 to 40 minutes or until the crumbs are lightly browned. Serves 8 to 10.
Output:
margarine, flour, milk, salt, pepper, Cheddar cheese, potatoes, onions, buttered bread crumbs