takyris said:
At barbecues, I ask that my veggie burger or kabob not be touching the meat stuff (or, like, right next to it where the juicy meat spatter will get onto it), but I understand that not everyone cleans their grill between each use -- I compromise by assuming that any meat products that were left on the grill beforehand have likely been charred away to nothing, so putting a veggie burger on a spot that had meat on it awhile ago is alright.
Random comment/PSA - clean your grill often!!!
When you leave gunk on the grill, the repeated exposure of said gunk to high temperatures causes a chemical reaction that makes some pretty nasty stuff - polycyclic aromatic compounds (kind of like benzene) and heterocyclic aromatic amines (still kind of like benzene, but less so). These have been
proven to be carcinogenic in animals, and while some people will say there's no conclusive proof about humans, I hasten to remind everyone we are animals too.

The most common place to find these is on grills, and while it may
seem like everything has been burned off, that isn't necessarily the case.
They're really cool compounds though, especially the PACs. Just not safe to ingest. Or touch really. But anything that bad has to be cool.
On topic, I'm very suspicious of all these specialty diets, the Atkins diet especially since it's the new fad. And while studies on the Atkins diets are as of yet inconclusive (not enough have really been done for or against, and none particularly scientifically, IMO), there haven't been
any that I know of that address the long-term effects of carbohydrate deprivation and the stresses it causes on the body. There are lots of key biological functions that depend on our ingesting of carbohydrates.
I'd definitely recommending having a talk with your gf and finding out exactly why she wants to become a vegetarian. If it is because of self-esteem reasons (which based solely on what has been said seems to be the case), I think it would be a good idea to try and get her to see a professional nutritionist at the very least, and possibly even seek counseling. I don't mean to be overly alarmist, but this seems like it could
very easily evolve into an eating disorder of some kind. At the very least a nutritionist will be able to discuss the pros and cons of becoming vegetarian a lot better than most of us here. It's a great step to take if you're doing it for the right reasons, but I'm not convinced this is the case here.