Trim stems of beans and toss in a pot of salted, boiling water for 3-4 minutes. Drain in a colander and rinse in cold water.
For the vinaigrette, add extra virgin olive oil, apple cider vinegar, Dijon, lemon zest, lemon juice, salt and pepper to a jar. Put on jar lid and shake to combine. Shake excess water off beans and add to bowl with vinaigrette.