Slice eggplant, zucchini, tomato, and onion thinly.
Heat olive oil in a pan and sauté onion and garlic.
Add tomatoes and season with salt and pepper.
Spread the tomato sauce evenly in an oven-safe dish.
Arrange the remaining vegetables in overlapping layers.
Drizzle with olive oil and sprinkle with herbs.
Bake at 180°C for 30 minutes.