Preheat your oven to 375°F (190°C).

Heat olive oil in a skillet over medium heat. Add diced zucchini and bell peppers, sauté for 5-7 minutes until tender.

Add minced garlic in the last minute of cooking.

Combine sautéed veggies with spinach, cheese, and eggs in a large bowl. Season with salt and pepper, mixing well.

Grease a baking dish with olive oil and pour the mixture into the dish.

Bake in the preheated oven for 30-35 minutes until golden brown.

Let cool for 5 minutes before serving.