Ingredients

• 2 pounds fresh unshelled chestnuts
• 2-3 sprigs rosemary
• 1/2 cup (1 stick) unsalted butter, melted
• 2 teaspoons (or more) kosher salt
• Pinch of freshly grated nutmeg
• Freshly ground black pepper

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Instructions

1. Preheat oven to 425°F. Place a large sheet of foil on a rimmed baking sheet. Place chestnuts, flat side down, on a work surface. Using a utility knife or a sharp paring knife, carefully cut through the shell on the rounded side of each chestnut to score an X. Soak in a bowl of hot water for 1 minute (this helps them steam while roasting).
2. Drain chestnuts and pat dry; place in a medium bowl. Add rosemary, butter, 2 teaspoons salt, and nutmeg. Season with pepper and toss to thoroughly coat. Arrange chestnuts in a single layer in center of foil (a few might overlap) and gather up edges of foil around chestnuts, leaving a large opening on top.
3. Roast until the peel begins to curl up and chestnuts are cooked through, 30-45 minutes, depending on size and age of nuts.
4. Transfer chestnuts to a platter, using a spatula to scrape in any butter and spices with them, and toss to coat. Season with more salt, if desired. Serve hot or warm.