I made some great green beans last week:

1 lb. fresh green beans
1 medium onion, chopped
1/2 lb. bacon, cut into small pieces.
1 tbs. cider vinegar
1 tbs. brown sugar.

Cook beans, set aside. Cook bacon pieces, drain and set aside.
Cook onions in bacon fat, drain then discard rest of bacon fat.
Mix beans, onion, bacon, vinegar, and brown sugar, and heat in a frying pan for a few minutes.

They were a big hit with my husband.