Which of the following is crucial to ensure when a dish is served to a guest with allergies?

Ensuring the safety of the dish is paramount when serving a guest with allergies, as food allergies can lead to serious health consequences, including life-threatening reactions. It is essential to verify that the dish does not contain any allergens that could trigger an adverse reaction in the guest. This involves understanding the ingredients used in the preparation of the dish, being aware of cross-contamination risks, and communicating effectively with both the kitchen staff and the guests.

In any food service setting, the safety of the dish encompasses not just the absence of allergens, but also proper handling and preparation methods to avoid cross-contact with allergens, which may occur if equipment or surfaces used for allergen-free food have been contaminated by other foods. Therefore, prioritizing the safety of the dish is the most responsible and crucial action when dealing with customers with food allergies.