01 - Preheat oven to 350°F. Lightly grease a large casserole dish with olive oil.
02 - Heat 1 tbsp olive oil in a large skillet over medium heat. Add diced chicken breast and cook until lightly browned and cooked through, about 5-7 minutes. Remove from skillet and set aside.
03 - In the same skillet, add remaining olive oil. Sauté onion and garlic for 2-3 minutes until fragrant.
04 - Add zucchini, broccoli, and peas to the skillet. Cook for another 5 minutes until just tender.
05 - Stir in spinach and cook for 1-2 minutes until wilted. Remove from heat.
06 - In a large mixing bowl, whisk eggs, Greek yogurt, cottage cheese, oregano, thyme, salt, and pepper until smooth.
07 - Add cooked quinoa, chicken, chickpeas, sautéed vegetables, and half of the shredded cheddar to the bowl. Mix until well combined.
08 - Pour the mixture into the prepared casserole dish. Sprinkle the remaining cheddar cheese evenly over the top.
09 - Bake uncovered for 30-35 minutes, or until the top is golden brown and the casserole is set throughout.
10 - Let the casserole rest for 5 minutes before serving to allow it to set for easier slicing.