French Country Potato Salad

Name: French Country Potato Salad
Ingredients: 3 pounds small creamer potatoes (about 30), unpeeled and scrubbed well; 4 pieces leek (white part only), split lengthwise and thinly sliced; 2 roasted red peppers, jarred or homemade; 2 tablespoons chopped fresh thyme leaves; 2 teaspoons chopped fresh tarragon leaves; 2/3 cup Champagne Vinaigrette, recipe follows; 2 tablespoons Dijon mustard; 2 teaspoons sea salt; 1/2 teaspoon freshly ground black pepper; 1/2 cup Champagne vinegar; 1 teaspoon sea salt; 1 1/2 cups extra-virgin olive oil; Freshly ground black pepper