Chestnuts roasting over an open fire may mean "Christmas" or "winter" to plenty of people, but these sweet and starchy nuts are much easier to roast in an oven. Both methods are explained here.
Plan on at least 1/3 pound of chestnuts per person and buy chestnuts that look plump and feel a bit heavy for their size. Avoid nuts that are cracked or have bruises or soft spots. You'll also want to bypass any nuts that rattle when you shake them - they have started to dry out and won't be tasty. Store chestnuts loosely wrapped in plastic in the fridge for up to a week (for longer storage, simply pop them in the freezer for up to a couple of months).
Preheat an oven to 400°F or prepare a live fire in a fireplace, fire pit, or grill.