6 medium-sized -
leeks
2 tablespoons -
white wine vinegar
1 tablespoon -
Dijon mustard
1 tablespoon -
water
¾ teaspoon -
salt
2 tablespoons -
extra-virgin olive oil
-
freshly-ground black pepper
2 tablespoons -
chopped fresh flat-leaf parsley
2 teaspoons -
chopped fresh tarragon leaves