Ted,
That reminds me of the man that fed his dog turnip greens; his buddy said " my dog won't eat turnip greens", to which he replied "mine wouldn't either, for the first three days". If you prepare something "normal", if made with beef, any adult should eat it as a matter of courtesy, if nothing else. If anyone refuses to eat it, maybe they would understand your point, if you refused to eat something they worked hard to prepare( and eat a sandwich instead).
Mike