Curly Pasta and Veggie Salad

Name: Curly Pasta and Veggie Salad
Ingredients: Vegetable oil cooking spray; 6 ounces sugar snap peas, strings removed, cut into 1/2-inch pieces; 3 plum tomatoes, seeded, cut into 1/2-inch pieces; 2 large yellow bell peppers, cored, seeded, cut into 1/2-inch pieces; 1 large orange bell pepper, cored, seeded, cut into 1/2-inch pieces; 1 tablespoon extra-virgin olive oil; 1 teaspoon minced fresh rosemary; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 1 pound cavatappi or macaroni pasta; 2/3 cup buttermilk; 2/3 cup safflower oil; 2/3 cup sour cream; 2 lemons, zested; 1/4 cup fresh lemon juice; 1/3 cup chopped fresh chives; 1/3 cup chopped fresh mint; 1/4 cup chopped fresh Italian parsley; 3/4 teaspoon kosher salt; 1/4 teaspoon freshly ground black pepper