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According to Tom Colicchio, there was a time when small towns in France each had a central bakery. The story goes that after the bread was done baking, the townsfolk would use the still-hot oven to roast their own food. Meats would be placed on an upper rack and potatoes would be placed below, allowing the drippings from the meat to season them. This dish is designed to replicate that effect by adding bacon and rich chicken stock to flavor the potatoes.