Pickled veggies add a great crunch to any meal and may help aid digestion by adding a bit of acidity to the mix. Pickling (adding vinegar and salt) also allows you to water bath can vegetables that would otherwise require pressure canning.
The first time I had a Bloody Mary, it was in New Orleans and the garnish was a pickled green bean instead of the usual celery. Seems that pickled beans are hard to find in the grocery, so maybe I'll make my own with this recipe from UGA. Dilly Beans - Food in Jars