This is something I have been doing lately and we love it! I cut up some vegetables, season them with olive oil, salt pepper, and add a few onion slices. Join 2 pieces of foil together down the long end. Place the vegetables in the middle, seal it up and pop it in the oven on a cookie sheet! Cook for about 30 minutes, or until vegetables are tender at 375 degrees! It's that simple, easy and they are yummy!