Preheat the oven to 350˚F.
Melt butter in a large skillet.
Add chopped onions, carrots, and celery. Cook until soft and translucent, stirring to keep from browning.
Add chopped chestnuts, herbs, and bone broth. Mix to combine the ingredients.
Add bread cubes and incorporate well. If the stuffing is too dry, add more broth however, it should not be soggy.
If stuffing your turkey: stuff turkey and roast for the appropriate time and temperature.
If baking the stuffing separately, bake the stuffing in the large cast-iron skillet with lid or any other baking dish with cover (you can use aluminum foil) for 30 minutes.
After 30 minutes, take lid or foil off and bake for another 10 minutes uncovered.
Pro tip: if you are baking the stuffing separately you can drizzle turkey drippings over it to get a better flavor.