How to roast chestnuts on a fire for a cozy outdoor gathering?

To roast chestnuts on a fire for a cozy outdoor gathering, make a small slit in each chestnut, place them in a chestnut roasting pan or on a baking sheet, and roast them over the fire for about 15-20 minutes, turning occasionally. Enjoy the warm and delicious chestnuts with friends and family for a cozy outdoor experience.