Mediterranean Pasta Salad

Name: Mediterranean Pasta Salad
Ingredients: Kosher salt; 1 pound tricolor pasta, such as bow tie or fusilli; 1/4 cup balsamic vinegar; 2 to 3 teaspoons dijon mustard; Freshly ground pepper; 2/3 to 3/4 cup extra-virgin olive oil; 1/3 cup diced sun-dried tomatoes; 1/4 cup fresh basil, julienned; 1/4 cup diced onion; 2 large pickled pepperoncini peppers, diced; 3 tablespoons halved black olives; 2 teaspoons chopped fresh oregano; 1 1/2 ounces feta cheese, crumbled; 1 1/2 tablespoons grated romano cheese