I've been to Alimentum a couple of times, and yeah, the veggie option tends to be less exciting than the meat. If you take the prix fixe menu (which is vaguely affordable!) the veggie option will probably be soup followed by risotto or similar. Very good soup and risotto, but still, doing a simple thing well rather than something exotic. Their desserts are out of this world, though. OK, I have a sweet tooth, but I do find that a lot of grand restaurants don't have desserts up to the quality of their mains. Alimentum serves stuff miles better than any other dessert I've tasted.