Making Greek Chicken Casserole is a simple process that guarantees a flavorful result. Just follow these steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Ingredients: Dice the onions and mince the garlic. Halve the cherry tomatoes and bell peppers.
3. Season the Chicken: In a large bowl, season the chicken breasts with salt, pepper, oregano, and thyme. Drizzle with olive oil and toss to coat.
4. Sauté Vegetables: In a large skillet over medium heat, add a tablespoon of olive oil. Sauté the onions and garlic until translucent, about 2-3 minutes.
5. Combine Ingredients: In a large casserole dish, layer the sautéed onions and garlic, followed by the seasoned chicken breasts. Top with bell peppers, cherry tomatoes, and Kalamata olives.
6. Add Chicken Broth: Pour the chicken broth over the layered ingredients to keep everything moist during baking.
7. Bake: Cover the casserole with aluminum foil and bake for 30 minutes. Remove the foil, sprinkle the feta cheese on top, and bake for an additional 15-20 minutes until the chicken is cooked through and the cheese is golden.
8. Rest the Casserole: Once done, take the casserole out of the oven and let it rest for 5-10 minutes.
9. Garnish: Before serving, sprinkle fresh parsley on top for an added touch of flavor and color.

These steps will guide you in preparing a delicious Greek Chicken Casserole that everyone will rave about!