Greek Turkey Burgers with Tomato Salad

Name: Greek Turkey Burgers with Tomato Salad
Ingredients: 1/4 cup mayonnaise; 2 tablespoons chopped pickled pepperoncini (2 to 3 peppers), plus 3 tablespoons brine; 1 pint assorted grape or cherry tomatoes, halved; 3 tablespoons extra-virgin olive oil; 4 scallions, chopped; 1/4 cup fresh mint, chopped; Kosher salt and freshly ground pepper; 1 1/4 pounds ground turkey; 1 medium zucchini (half grated, half cut into matchsticks); 1/2 cup finely crumbled feta cheese; 1 teaspoon dried oregano; 4 pitas, warmed