I consider the question with narrowed, gleaming eyes. I know picky eaters. As a waitress, I meet a million people. Many are cheerful and easy to please, but some are . . . I've watched balding adults all but hurl themselves to the floor, kicking and screaming, because smoked trout was not on the menu.
Life is so hard and unfair.
The best cure I've found is to threaten perpetrators with something infinitely worse. They become more amenable almost immediately. Losing their options seems to clear their head. What a shame. I'll have to bring pumpernickel.