Too funny @MotherOfDragons - that is probably an approach that would work. My friend’s D that I referenced upthread used to say “fine I will starve myself then” if my friend told her she had to choose something that was being served rather than have something specially prepare for her. I think if you give in once to this, you are doomed.
I am lucky in that my children have no allergies and eat just about everything. One exception - lima beans.