Make the dressing, in a small bowl combine all of the dressing ingredients, whisk until the sugar has dissolved.
In a large bowl, combine the three beans, with the onion and parsley. Pour the dressing over everything, and give the salad a good toss until well combined.
Cover with plastic wrap, and chill in the fridge until serving.
Any 3 beans can be used, i.e garbanzo, cannellini, haricot, etc. It’s recommended to add at least one creamy bean to the salad.As the salad sits in the fridge before serving, it marinates the beans and intensifies the flavors.