In the South these are sometimes called “dilly beans” because of the dill that goes into the jars with the beans. My only reservation about making pickles out of green beans is that it is impossible for the beans to retain their wonderful green color. But I forget about this regret when I taste them, redolent as they are with coriander seeds and dill. You can serve them as an aperitif, garnish or side, or cut them up and add them to salads.
Find this recipe here: http://cooking.nytimes.com/recipes/1016828-pickled-green-beans