French Bean Salad with Tarragon and Green Peppercorn

Name: French Bean Salad with Tarragon and Green Peppercorn
Ingredients: 1/2 pound French green beans, stems removed; 1 small green zucchini (about 6-8 oz.), julienned lengthwise then cut in half; 2 teaspoons white wine vinegar; 4 teaspoons olive oil; 1 tablespoon mayonnaise; 1 pinch flaky sea salt, more to taste; 1 tablespoon chopped fresh tarragon; 1/2 teaspoon green peppercorns, finely crushed (more to taste); 1 teaspoon capers, rinsed and chopped, more to taste