Preheat your oven to 375°F (190°C). Grease your baking dish with olive oil.

Heat olive oil in a skillet over medium heat. Sauté diced onions and minced garlic for 3-5 minutes until translucent.

Add sliced zucchini and chopped bell peppers to the skillet. Cook for another 5-7 minutes until softened.

In a mixing bowl, combine the sautéed vegetable mixture with cheese, eggs, and herbs. Season with salt and pepper.

Pour the mixture into the greased baking dish, spreading it evenly.

Bake for 25-30 minutes until golden-brown and firm.

Let it cool for 10 minutes before serving.