Grilled Chicken and Ratatouille

Name: Grilled Chicken and Ratatouille
Ingredients: 2 medium zucchini, halved lengthwise; 1 medium Japanese eggplant, halved lengthwise (can also use regular Italian eggplant); 1 red bell pepper, cut into 1-inch-wide strips; 1 red onion, peeled, cut into 1/2-inch-wide wedges (leave root end intact); 2 medium tomatoes, halved crosswise; 2 tablespoons olive oil; 6 boneless skinless chicken breast halves (about 3 pounds); 1⁄3 cup thinly sliced basil; 1 1⁄2 teaspoons red wine vinegar or 1 1⁄2 teaspoons balsamic vinegar