Final answer:
In a healthcare setting, when metal is found in an entrée, the dietitian's immediate action should be to halt serving the entrée and validate the report to prevent harm and investigate the cause.
Step-by-step explanation:
The subject of this question falls under the category of Health, specifically related to the responsibilities and appropriate actions of a dietitian in a healthcare or food service setting. Upon being notified that a patient has found curls of metal in an entrée, the most professional and safest initial step for a dietitian to take would be to stop serving the entrée immediately and verify the accuracy of the report. This is because the presence of metal could indicate a serious health hazard as well as potential issues with food preparation or equipment integrity. Confirming this information promptly would be crucial to prevent harm to other patients who may have been served the same entrée and to ensure steps are taken to correct the cause and prevent future occurrences.