take your beans and chop em how you want em, whether that's Not At All if you're some kinda freak who likes Long Beans, cutting them in half like my lazy ass does, or doing some weird biased french cut bullshit, give them that slice

now take some oil (or butter) and grease those bad boys up. Throw in some minced garlic, some onion powder, some garlic powder because you can't have too much garlic, some salt and pepper, and maybe a little thyme

now go roast those fuckers at 400 degrees for like idk 10 minutes before you check on them. They should be wilted, browning, starting to char in some spots. If not, wait a little longer until they are

this is how you roast a green bean

I'm telling you this because apparently I roast a pretty mean green bean, since these college kids will eat like 10Ib of them when I make them (versus <5Ib when the other cooks make them) so I guess I have some sort of Special Knowledge here