1Preheat your oven to 375°F (190°C).
In a large skillet, heat the olive oil over medium heat.
Add the diced onion, carrots, and celery to the skillet. Sauté until the vegetables are tender, about 5-7 minutes.
Add the chicken thighs to the skillet and cook until they are no longer pink, about 8-10 minutes.
Remove the skillet from heat and let the mixture cool slightly.
In a large mixing bowl, combine the cubed bread, cooked chicken and vegetable mixture, dried rosemary, dried parsley, salt, and black pepper.
Pour the chicken stock over the bread mixture and stir until well combined.
Transfer the mixture to a greased baking dish.
Cover the dish with aluminum foil and bake in the preheated oven for 25 minutes.
Remove the foil and bake for an additional 10-15 minutes, or until the top is golden brown.
Remove from the oven and let it cool for a few minutes before serving.