Preheat the smoker to 350 degrees.
Add the sage, rosemary, thyme, celery seed, butter, celery, onion, salt, and pepper to a medium skillet and saute until the onions turn translucent. This will take about 5-7 minutes.
In a small mixing bowl, lightly beat the 2 eggs.
Place the bread cubes in an extra-large mixing bowl. Pour the lightly beaten eggs over the top, followed by the sauteed mixture, finishing with the chicken broth.
Fold until the ingredients are fully combined and the bread pieces are nicely coated.
Pour into your casserole dish and spread even without smashing the ingredients flat. You want it to remain fluffy.
Sprinkle the freshly minced parsley evenly over the top.
Place it in the smoker, uncovered, and let it cook for 30 minutes.
Remove from the heat, serve, and enjoy!