Prep the Turkey: Tie the turkey with string, making sure to secure the legs and wings close to the body.
First Roasting: Place the turkey in the oven and roast for 30 minutes.
Add Duck Fat: Remove the turkey from the oven, apply duck fat on the surface, and season with salt.
Second Roasting: Return the turkey to the oven and roast for another 30 minutes.
Final Roasting: After the second roasting, check the turkey's internal temperature. Continue roasting until it reaches 72°C at the heart, approximately after a total of 2 hours of cooking.
Prepare Mussels: While the turkey is roasting, prepare the mussels by cooking them until they are hot.
Serving: Once the turkey is ready and rested, carve it and serve with the mussels. Drizzle some cooking juices over the top before serving.