Preheat the oven to 400°F (200°C) and lightly coat a 9x13-inch baking dish with cooking spray or oil.
In a large mixing bowl, combine the sliced zucchini with olive oil, minced garlic, salt, pepper, and dried herbs. Toss until the slices are uniformly coated.
Evenly distribute the seasoned zucchini slices in a single layer across the prepared baking dish.
Sprinkle the mozzarella and Parmesan cheeses uniformly over the zucchini. Follow with a layer of breadcrumbs to form a crisp topping.
Transfer the dish to the oven and bake for 20 to 25 minutes, or until the cheese is melted, the topping turns golden brown, and the zucchini becomes tender.
Once baked, remove from the oven and, if desired, finish with a sprinkle of freshly chopped parsley. Serve immediately while warm.