Roasted Vegetable Gratin

Name: Roasted Vegetable Gratin
Ingredients: Nonstick cooking spray; 1 1/2 Cup sliced unpeeled zucchini; 1 Cup sliced mushrooms; 1/2 Cup coarsely chopped onion; 1/2 Cup red bell pepper; 2 Tablespoons balsamic vinegar; 1 3/4 Cup water; 1/3 Cup dried tomatoes (not packed in oil) snipped into small pieces; 1/2 Teaspoon salt; 3/4 Cups couscous, uncooked; 1/2 Cup toasted wheat germ, such as Kretschmer Original; 1 Cup (4 ounces) crumbled feta cheese; 3 egg whites, lightly beaten; 1 Teaspoon dried basil or Italian seasoning blend