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.

Place hamburger in a large, deep skillet. Crumble and cook over medium high heat until evenly brown. Remove from heat and sprinkle flour over cooked hamburger. Stir until evenly coated and all fat is absorbed., Place skillet over medium heat, add 1/2 of milk and stir until gravy begins to thicken. Add remaining milk until desired consistency has been reached and gravy comes to a boil. Season with salt, pepper and onion salt., Serve over mashed or boiled potatoes, toast or biscuits. Add fresh chopped onion if desired.
Output:
lean ground beef, all-purpose, milk, salt, onion salt, onion