Calling all vegetarians!!

I need some etiquette advice. We are having my husband's younger brother and his girlfriend (A) over for dinner on Wednesday night. I was planning on doing roast lamb and I just found out that A is vegetarian.

Be honest - do you think it is OK for me to prepare that meal and just not serve A any meat, rather than cooking a separate dish for her? She would be able to eat:

- cauliflower & broccoli cheese (which also will have peas and spinach in it)
- roast potatoes, kumara and red peppers

Obviously I will cook the vegetables in a separate dish to the lamb so there will be no cross-contamination.

Another member of the family (girlfriend of the third brother) is vegetarian and my MIL usually prepares something extra just for her, liked stuffed mushrooms, but with a two year old and a wee baby I was kind of hoping to avoid the extra work...but would rather do that than insult/upset A of course.

I briefly considered changing tack completely and making a completely vegetarian meal but my husband is a total carnivore (as am I) and now has his heart set on the lamb!

Thoughts??

Personally, I'd just do a vegetarian meal, because then there's no awkwardness. Could you do the lamb another night for hubby? He'd get more that way anyway

when SIL comes to family dinners if we are all having raost we just make sure that the roast vege's werent in with the meat, and that there's heaps and a filling salad too (tabouli (sp.) is her favourite) and she's never complained as at home she cooks meat for hubby (a dairy farmer) she just doesnt eat any herself

Depends on the person whether they will mind. I know some who do mind this and others who don't.

Personally i would make a totally vegetarian meal and save the roast for another day.