Giada's Tomato Vegetable Casserole Recipe

• 1 medium potato, peeled and cut into 1/2-inch pieces
• 1 medium sweet potato, 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 seasoned bread crumbs

Directions