Bring a large pot of water to a boil and set up an ice bath.
Trim and cut the green beans into 1” pieces, then add the beans. Boil for 1 minute, then transfer to the ice bath to stop the cooking.
While the beans cool, chop the cucumbers and add them to a large bowl.
In a small bowl, whisk together the dressing ingredients.
Add the green beans to the bowl and pour in the dressing. Mix to get the veggies evenly coated with dressing.
Serve immediately. Leftovers are great in a bowl or on toast.
