Pre-heat oven at 400F.
Take the turkey out of the fridge and rinse it under cold tap water. Rinse the turkey inside out to completely remove the dry brine rub.
Pat dry turkey using paper towels. Stuff the turkey with stuffing veggies and herbs. Close the cavity of the turkey as tight as possible.
In a clean roasting pan (you can clean the previous pan or use a new one), add roasting vegetables(except brussels sprouts) and drizzle them with 3 tbsp of vegetable oil. Mix well.
Place the turkey on top of the vegetables. Roast at 400F for 20 minutes.
Reduce the oven temperature to 325F and continue cooking the turkey until the internal temperature of the thigh reaches 165F, approximately 1.5 to 2 hours. For a 12-lb turkey, the total cooking time should not exceed 2.5 hours.
From this point of cooking, you can baste the turkey with softened butter and pan drippings every 30 or 40 minutes.
The more you baste, the more golden the skin will be. If the turkey begins to overbrown, cover the top loosely with aluminum foil or parchment paper.
Approximately 45 minutes before the turkey is done, add brussels sprouts to the roasting pan to cook them.
When the turkey is done, remove it from the roasting pan. Remove the stuffing immediately and discard it.
Let the turkey rest for at least 15 minutes (ideally 30-40 minutes) to allow even distribution of juices.
Move the vegetables in the pan to a clean bowl and keep them warm to serve.
Use the roasting pan with drippings to make gravy to serve together with turkey.
When the time comes, carve the turkey and serve with gravy and other side dishes of your choice.