Mediterranean Vegetable Salad

Name: Mediterranean Vegetable Salad
Ingredients: 2 small eggplants, quartered, lengthwise, and cut into smaller strips if desired; 2 medium red onions, peeled, quartered lengthwise; 3 red bell peppers, quartered; 3 zucchini, quartered lengthwise and cut into smaller strips if desired; 5 tbsp olive oil; ¾ tsp kosher salt; ½ tsp each black pepper; ½ tsp red pepper flakes; ¼ cup pine nuts, toasted; for the dressing-; 4 tbsp plain yogurt; 2 tbsp finely chopped fresh mint, plus extra leaves for garnish; 1½ tbsp lemon juice; 1 tsp cumin; ¼ tsp kosher salt