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.

Brown chops in 2 tbsp of oil; add 2 cups chicken broth., Simmer, covered, 45 minutes or until tender., Remove chops from pan; keep warm., If necessary, add enough chicken broth to pan drippings to make 2 cups; set aside., Heat remaining oil in saucepan; stir in vegetables and garlic., Cook until until just hot., Combine reserved liquid, cornstarch, soy sauce and gravy sauce., Cook over low heat, stirring, until thick and clear., Stir into vegetable mixture., Spoon over chops.
pork loin chops, vegetable oil, chicken broth, green onions, water chestnuts, stalks celery, fresh mushrooms, red bell pepper, garlic, cornstarch, soy sauce, brown gravy