Creating Dump and Bake Chicken Tzatziki Rice is straightforward. Simply follow these steps:

1. Preheat your oven to 375°F (190°C).
2. In a large baking dish, arrange the chicken breasts in a single layer.
3. Rinse the uncooked rice under cold water until the water runs clear, then spread it evenly over the chicken.
4. In a separate bowl, combine the chicken broth, garlic powder, onion powder, oregano, salt, and black pepper. Mix well.
5. Pour the broth mixture over the chicken and rice, ensuring the rice is submerged.
6. Cover the baking dish tightly with aluminum foil.
7. Bake in the preheated oven for 40-45 minutes, or until the chicken is cooked through and the rice is tender.
8. Remove the dish from the oven and let it rest for 5 minutes. Uncover and mix the chicken and rice gently.
9. Stir in the tzatziki sauce until the chicken and rice are well coated.
10. Garnish with diced cucumber and optional fresh dill before serving.

By following these steps, you can create a delicious and appealing meal that showcases the fantastic flavors of the Mediterranean!