Can you give your baby, well 18 month old, instant cup-a-soup??

I was just eyeing my own 4pm snack and thought that it would make a great dinner if given with a slice of toast, which, beside the point, I am now drooling for.

I know instant food is not always "good" in the respect that it contains salts and fats, but surely one cup once in a while would not hurt?? Or am I mistaken???