In a medium pot add sliced potatoes, cover with water and bring to a boil, let cook until potatoes are fork tender.
Meanwhile in a large bowl whisk together dressing ingredients.
Add shallots and beans to bowl of dressing and toss to coat.
When potatoes are done drain and let cool slightly.
Add potatoes to bowl and mix to combine.
Taste and add additional sat if needed.
Serve immediately or at room temperature.