Looking for a protein-packed vegetarian casserole? Try this vegetable and quinoa casserole! It combines a variety of colorful vegetables like bell peppers, carrots, and peas with cooked quinoa and a creamy sauce made from Greek yogurt and spices. The casserole is then baked until golden and bubbly, creating a satisfying and healthy dish. Quinoa is a complete protein, meaning it contains all nine essential amino acids. This casserole is a great way to incorporate more vegetables and plant-based protein into your diet.