When I began roasting vegetables (like broccoli with pine nuts) it was like a whole new world opened up. It's amazing how slow heat and aromatics can transform a vegetable.
Take the plain ole green bean.
Preheat the oven to about 400 degrees. Arrange fresh green beans (about one pound or so) in a single layer on a baking sheet. Top with a chopped onion, yellow or white, your choice. Drizzle with olive oil and sprinkle with salt and pepper.
Put in the oven and that's it! Stir a few times and let roast for 20 to 25 minutes.
Any leftovers can be folded into a pasta dish the next night.