Grilled Vegetable and Barley Salad

Name: Grilled Vegetable and Barley Salad
Ingredients: 2 1⁄4 cups pearl barley; 2 large zucchini, cut lengthwise into 1/2-inch-thick slices; 1 medium eggplant, cut crosswise into 1/2-inch-thick slices; 2 red bell peppers, stemmed, seeded, and halved; 1⁄2 cup extra-virgin olive oil, divided; Kosher salt and freshly ground black pepper; 1⁄4 cup fresh lemon juice; 1 tsp. ground cumin; 1⁄2 tsp. ground coriander; 1 clove garlic clove, finely chopped; 2 oz. feta cheese, cut into 1/2-inch cubes; 1 cup loosely packed arugula; 1 cup coarsely chopped cilantro; 1 cup cup coarsely chopped Italian parsley; 1⁄4 cup pistachios; 4 scallions, thinly sliced; 1 long red chile, stemmed, seeded, and finely chopped