Preheat oven to 400°F (200°C)
Lightly grease a large baking dish
In a large bowl, combine eggplant, zucchini, bell peppers, cherry tomatoes, and red onion
Drizzle olive oil over vegetables and toss to coat evenly
Add minced garlic, oregano, basil, thyme, salt, and black pepper
Toss until vegetables are well seasoned
Spread vegetables evenly in the prepared baking dish
Roast until vegetables are tender and lightly caramelized
Remove from oven and sprinkle mozzarella and feta evenly over the top
Return to oven and bake until cheese is melted and slightly golden
Remove from oven and let rest for a few minutes
Garnish with fresh parsley before serving