Brioche Sausage Roll

• 1 dried pork sausage for cooking, weighing about 2 ¼ lb. (1 kg) and about 12 in. (30 cm) long (at specialty charcuterie counters)
• 1 cup (250 ml)

Place the dried sausage in cold water in a pan over minimum heat. Cook it, ensuring that the water does not boil, for 30 minutes. Then remove the pan from the heat and leave the sausage to cool a little. Preheat the oven to 475°F (240°C), or as high as your oven will go. While the saus