This subject has been quite extensively discussed, but as a notorious creo-food naysayer 
I cant control my urges to chime in.
In terms of the Laws of Magic you could say the Limit of Energy makes it impossible or you could say that nourishment is more than the mere effect of eating something (and that that something must have an essence beyond a limited duration of a given non-vis creo spell).
In short my personal vendetta on non-permanent nourishing food is actually setting integrity - how you argue pro or con is only, albieth important, a spice 
. The ability to make food as an off-hand trick is extraordinary setting-altering. It changes the face of Mythic Europe - and it changes the story we tell.
All in all in the end -especially with the RAW being unclear on the matter- this really is a matter of YMMV.
To get around some of the points of the issue I recommend this thread: [url]https://forum.atlas-games.com/t/consensus-building-on-magically-created-food/1172/1] or taking a look at the FAQ at http://redcap.org/FAQ/FAQ.html to which the resident mediator extraordinaire, aka Andrew, posted a fair summary.