The same things you would do with many dried beans -- use them in soups, as a hearty side, or something akin to this delicious recipe for borlotti beans on toast: http://bit.ly/grJTKy They're common in Mexican dishes like refried beans too.

Assuming you have dried ones, they are used like other dried beans. They are considered a hard bean, and an overnight soak before cooking is ideal. I'd probably use them to make a bean soup.