Preheat your oven to 375°F (190°C) and grease a 9x9-inch baking dish with olive oil.

In a mixing bowl, combine oregano, smoked paprika, garlic powder, salt, and pepper. Toss chicken pieces in this mixture.

Heat olive oil in a large skillet over medium-high heat and sear chicken pieces for 3-4 minutes on each side.

Add chopped onion to the skillet and sauté for about 3 minutes. Stir in the minced garlic and cook for 30 seconds.

In a bowl, whisk together eggs and Greek yogurt until smooth; season with salt and pepper.

Mix the seared chicken with the sautéed onion and garlic.

Layer half of the zucchini in the greased dish, followed by the chicken mixture, half of the creamy mixture, and half of the cheeses. Repeat layers.

Cover tightly with aluminum foil and bake for 20 minutes.

Remove the foil and bake for an additional 10-15 minutes until cheese is golden and bubbling.

Let the bake rest for 5 minutes, garnish with fresh herbs if desired, and serve warm.