So I prefer to roast my vegetables, usually with olive oil - makes them quite delicious.

What are the pros and cons to this and other ways of cooking vegetables?

My main concerns are that roasting the vegetables increases glycemic load possibly - if anyone knows if it does, let me know and how much it does - and the use of olive oil for high temperature cooking. I'm wondering if it makes the PUFAs go rancid and thus bad for health? If it is bad, what is the best way to cook them that also imparts flavor?

I was totally clueless about cooking before going primal, and now know much more, but still have much to learn.

Thanks in advance!