Mediterranean Eggplant and Barley Salad

We had this with lamb chops for Easter dinner -- it makes a nice Sunday after-church meal because you can make everything ahead of time. You can make it #vegan by swapping the chicken broth for vegetable broth.  The salad is twice as good the next day.

1 1/2 lb eggplant, cut into 1/2-inch cubes
3/4 lb zucchini, cut into 1/2-inch cubes
10 tablespoons extra-virgin olive oil
1 teaspoon salt
1 teaspoon black pepper
1 cup chopped scallion (from 1 bunch)
1 1/2 teaspoons ground cumin1/2 teaspoon ground coriander
1/4 teaspoon cayenne
1 1/4 cups pearl barley (8 oz)
1 3/4 cups chicken broth (14 oz)
3/4 cup water
2 tablespoons fresh lemon juice
1 garlic clove, minced
1/4 teaspoon sugar
1/2 lb cherry tomatoes, quartered
1/3 cup Kalamata or other brine-cured black olives, pitted and halved
1/2 cup thinly sliced red onion
1 cup chopped fresh flat-leaf parsley
1/2 cup chopped fresh mint

Roast eggplant and zucchini: Put oven racks in upper and lower thirds of oven and preheat oven to 425°F. Toss eggplant and zucchini with 5 tablespoons oil, 3/4 teaspoon salt, and 3/4 teaspoon pepper in a bowl, then spread in 2 oiled large shallow (1-inch-deep) baking pans. Roast vegetables in oven, stirring occasionally and switching position of pans halfway through baking, until vegetables are golden brown and tender, 20 to 25 minutes total.

Cook barley: Heat 2 tablespoons oil in a 3- to 4-quart heavy pot over moderately high heat until hot but not smoking, then cook scallion, cumin, coriander, and cayenne, stirring, until fragrant, about 1 minute. Add barley and cook, stirring until well coated with oil, 2 minutes more. Add broth and water and bring to a boil. Reduce heat and simmer, covered, until all of liquid is absorbed and barley is tender, 30 to 40 minutes. Remove from heat and let stand, covered, 5 minutes. Cool, uncovered, to room temperature, about 20 minutes.

Make dressing and assemble salad: Whisk together lemon juice, garlic, sugar, and remaining 1/4 teaspoon salt, 1/4 teaspoon pepper, and 3 tablespoons oil in a large bowl. Add barley, roasted vegetables, and remaining ingredients to bowl with dressing and toss until combined well.