Sorry Nickkname, but you quoted the verse wrong, at least that is not what is stated in the version , Rheims, that I looked it up in. The quote is
"***I seemed indeed to eat and to drink with you but it use an invisible meat and drink, which cannot be seen by men.*** (Quote can be found at the NEW ADVENT site)
To me this indicates that, yes, the Angels do eat, but what they eat is not visible to men. I does not say that it is a vision.