No Pilots must not eat while at the controls, its stupid, dangerous and outlawed by the ANO - unless in Class G airspace, in sight of the surface, day VFR only....
Ask a silly question and get a silly answer
Myself, I've been known to munch on the remains of a "Giant Burger" from one of the Casino's in Laughlin NV, though it did start to get a bit rank after a few hours of sitting in the sun.