Do veggies have sodium in them? *is clueless*

I really like this for comforting flavors:
http://www.deliaonline.com/recipes/lamb-chops-with-roasted-vegetables,963,RC.html

I make this with red bell peppers, onions and whole bulbs of garlic; they roast and turn sweet. You can pretty much add any kind of vegetable that roasts well.