Baked Ratatouille Gratin

Name: Baked Ratatouille Gratin
Ingredients: 2 teaspoons olive oil; 5 garlic cloves, peeled; 2 zucchini, halved lengthwise and cut in 1/2 inch thick slices; 2 yellow squash, halved lengthwise and cut in 1/2 inch thick slices; 1 large onion, cut in 1/2 inch chunks; 3/4 lb eggplant, cut in 1/2 inch chunks; 2 (8 ounce) cans tomato sauce, no salt added; 14 1/2 ounces stewed tomatoes, no salt added, chopped with their juices; 1 teaspoon dried oregano; 3/4 teaspoon salt; 1/3 cup breadcrumbs, dried and plain; 1/2 cup part-skim mozzarella cheese, shredded; 1 teaspoon fresh parsley, chopped