In a large mixing bowl, combine the beans, chopped peppers, cucumber, onions, capers and fresh herbs. Mix using a wooden spoon.
In a small bowl, add the vinaigrette ingredients. Whisk vigorously to combine.
Add the vinaigrette to the salad bowl. Toss to coat.
For best results, cover and refrigerate for a bit before serving so that beans soak up the vinaigrette flavors. Give the salad another quick toss before serving.
