1 medium (about 1 pound) eggplant, cut into 3/4- to 1-inch cubes
1 pound zucchini, cut into 3/4- to 1-inch cubes
1 large red bell pepper, cored, seeded and cut into 1/2- to 3/4-inch squares
2 medium onions, cut into 1/2- to 3/4-inch cubes
2 tomatoes, seeded and cut into 1/2- to 3/4-inch cubes
1/3 cup extra-virgin olive oil
Salt
Freshly ground black pepper
2 cups uncooked couscous
2 tablespoons extra-virgin olive oil