Prepare the brine by mixing the salt and water in a large container. Rinse the turkey, place it in the container making sure it's covered by the brine, and place in refrigerator for 24 hours.
When ready to cook, preheat oven to 180°C.
Mix the marinade ingredients in a blender or food processor.
Rinse turkey and pat-dry. Rub with marinade and put it in a deep tray, breast side down.
Top with dollops of butter and place in the oven. Cook for approximately 70 minutes, basting with the liquid every half an hour.
Turn the turkey breast side up and cook for another 70 minutes, basting with the liquid every half an hour.
Turn off oven, let turkey sit for 15 minutes or so. Then take it out and cover with foil. Let rest for 15 minutes before carving.
Enjoy with applesauce and your favourite salad.