Preheat your oven to 350°F. In a large skillet, melt butter over medium heat and sauté the diced onion and chopped celery until softened, approximately 5 minutes. Add the sliced mushrooms and cook for another 2 minutes, stirring occasionally.
Add the turkey strips to the skillet and cook until lightly browned, about 4-5 minutes. Season with salt and pepper, then stir in the fresh sage, thyme, and parsley. The aromatic herbs will release their oils immediately.
In a large mixing bowl, combine the bread cubes with the herb-vegetable mixture. Gently toss everything together, ensuring the bread cubes are evenly distributed with the vegetables and turkey.
Pour the chicken broth and chicken stock over the bread cubes while stirring gently. The bread should be moistened but not soggy—this is where this thanksgiving herb stuffing crowd recipe truly shines. Add the beaten eggs and fold everything together until just combined.
Transfer the mixture to a greased 9x13 baking dish, pressing down lightly. Bake for 45 minutes until the top is golden brown. The edges will crisp slightly while the interior stays tender and moist.
Remove from the oven and let it rest for 5 minutes before serving. This resting period allows the flavors to settle and makes it easier to portion.