One of our household go to favorites. We usually eat these once or twice every week now.
Preheat oven to 400 F. Cover a cookie sheet covered with aluminum foil and lightly coat with spray oil. Salt and pepper foil. Cut off the ends of green beans and place them in a single layer on the sheet and spray them with oil and salt and pepper again.
Cook for twenty minutes at 400 F or until they look like this:
I cooked these with pioneer woman's chicken thighs: http://thepioneerwoman.com/cooking/2011/10/penne-with-chicken-thighs/ After I put these in the oven I found out my broiler was broken so no crusty cheese this time. But still two thumbs up.