Given the task definition and input, reply with output. 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.

Peel and slice potatoes., Place in a pot., Cover with hot water and bring to boil; simmer for 5 minutes., Drain; place in a deep dish lined with pastry., Sprinkle each layer of potatoes with sugar and spices., Dot with butter., Pour milk over potatoes., Top with strips of pastry., Bake at 450 for 10 minutes., Reduce heat to 325 and bake for 45 minutes more.
sweet potatoes, brown, nutmeg, cinnamon, lemon, butter, milk