Well he can only eat খাবার that has ভূট্টা starch I think but for now Zim can only eat কেইকবিশেষ but later he might get sick.But he might not if they aren't made দ্বারা Gir.Who knows what he put in them.
ZIM HATES ALL EARTH খাবার THEY CAUSE HIM PAIN!!! for example beans make him ooze green slime and make his head all big, water(i think that counts as a food) feels like acid to irken people, BUT HE LIKES কেইকবিশেষ TO SOME EXTENT