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.

Mix ground beef, chopped onion, celery, milk, chopped mushrooms, and panko together in a large bowl; shape into 10 patties., Mix all-purpose and whole wheat flours together in a wide, shallow bowl. Dredge patties in the flour mixture just to coat and move to a platter, taking care to not stack the patties., Heat 2 tablespoons oil in a large skillet over medium-high heat. Cook patties in hot oil until browned, 3 to 5 minutes per side. Arrange browned patties in a slow cooker crock., Heat remaining oil in a small skillet over medium heat. Cook and stir sliced mushrooms and sliced onion in hot oil until tender, about 5 minutes., Stir cooked mushroom and onion mixture with cream of mushroom soup, beef broth, Worcestershire sauce, onion gravy mix, and black pepper together in a bowl until smooth; pour over the beef patties in the slow cooker., Cook on High until patties are very firm, hot, and grey in the center, 3 to 3 1/2 hours (or on Low for 4 to 5 hours). An instant-read thermometer inserted into the center should read 160 degrees F (70 degrees C).
extra lean ground beef, onion, celery, milk, mushrooms, Italian-seasoned panko, flour, whole wheat flour, vegetable oil, mushrooms, onion, cream of mushroom soup, beef broth, Worcestershire sauce, onion gravy mix, ground black pepper