That sentence is incorrect. You can ask "What am I eating?" You could also say, "What is it that I am eating?" but this is just a longer version of the above. Hope this helps :)

Hello george ^^ thank you for correcting. actually I don't know because I wrote it some months ago. sorry :)

What is it that I am eating - is correct. What is this? - might be better... or if you are sharing a meal "What is this called?" "What is this called... that we are eating" "What do you call this food?" It's tricky. What were you eating? - I wonder.

i think its wrong it should <what is am eating>

It is perfectly correct! [What I am eating] is a noun clause. Therefore: What is [what I am eating]?....is perfectly correct.