The other night, the bartender of a restaurant I frequent, told me the resto had just had an allergic experience that would interest me.
A couple came in with about five other people and they all sat and ordered. The woman identified herself as anaphylactic to nuts. The kitchen, the bartender said, went out of their way to create a safe dish for this patron. They used clean pans and clean utensils and the head chef made her dish himself. The table was served and the allergic patron proceeded to taste her boyfriend’s pasta, which had walnut pesto. (The BF's pasta dish was identified as walnut pesto on the menu - I just checked). According to the bartender, the allergic patron started yelling at the waiter, “Why didn’t you tell me HIS dish had nuts?” And then: “Does anyone have an Epi-pen?” The restaurant directed her to the nearest ER where she proceeded to go with her boyfriend.
Even though this story is now told to you third hand and certainly details are missing, generally speaking: how many issues can you see here and how would you fix them?