I have the past two years taken to roasting green beans.
Here is how I do it.
Clean about 2 cups fresh green beans and place in a covered iron chicken fryer sprayed with olive oil spray. On top put one diced red sweet pepper along with one small onion diced and one minced clove garlic.
Salt well then spray well with cooking spray. Next add on top about 5 to 6 slices lemon.
Cover and bake at 350 for about 40 minutes. When they come out take off the lemon, stir well and sprinkle with grated parmesan cheese.
The green bean actually brown a bit on the bottoms and hubby and I like that. They may be cooked too long for some but we find they are perfect.
Something a bit different eating browned green beans.