Tomato Vegetable Casserole

Name: Tomato Vegetable Casserole
Ingredients: 1 medium potato, peeled and cut into 1/2-inch pieces; 1 medium yam, peeled and cut into 1/2-inch pieces; 1 red bell pepper, seeded and cut into 1/2-inch pieces; 2 carrots, peeled and cut into 1/2-inch pieces; 5 tablespoons olive oil; 1 red onion, thinly sliced into rings; 2 small or 1 large zucchini, cut crosswise into 1/4-inch-thick pieces; Salt and pepper; 2 large ripe tomatoes, cut crosswise into 1/4-inch thick slices; 1/2 cup grated Parmesan; 2 tablespoons dried Italian-style bread crumbs; Fresh basil sprigs, for garnish