For the Turkey 

A fresh Turkey of around 5 kg
200 Gramms Soft Butter, preferably mixed with black truffle cubes 
3 Apples, halved  
3 Onions, peeled, halved 
3 Sprigs of Thyme 
3 Christmas Cookies (in Switzerland - Basler Leckerli) 
5 Liters of Brine (10% Salt) 
6-7 Strips of rather thickly cut bacon 
3 Carrots, peeled, halved 
1 Celeriac, peeled, quartered 
1 Onion, halved 
Salt/Fresh Pepper 

For the Gravy 

2 dl White Wine 
5 dl Water 
3 Tablespoons of Creme Fraiche 
2 Sprigs of Thyme 
3 Christmas Cookies (Basler Leckerli, if available) 
1 Tablespoon of Corn Starch 
Salt/Fresh Pepper 

For the turkey: 

Submerge the turkey in the brine for 2-3 hours. (This step can be left away with a bit of a lesser result). Take out the turkey and pat fully dry with paper towels. Preheat the oven to 220° Celcius. Fill the turkey with two of the halved onions, tow of the halved apples, thyme and the cookies. Gently separate the skin - without tearing it - from the meat. Push 80% of the butter between breast skin and meat - work gently. Fully massage the rest of the butter onto the turkey. Season the whole turkey with salt. Put the turkey into a large tray and into the oven for 15 minutes. Take out - baste it with its juices and the butter. Cover the breast with the bacon. Reduce oven temperature to 180° and bake to a core temperature of 73° - measured in the deepest part of the breast. Baste the turkey with its juices every 20 minutes.About 4 1/2 hours. Take out the turkey - put aside - making sure that all the juices inside the turkey remain in the tray. Rest for a minimum of 1 hour - up to 2 hours. (which is the most important trick to obtain a perfect result) 

For the gravy: 

Add white wine and water into the tray. Ad the bacon pieces, thyme and add the scrapes of the turkey you will not need. Cook liquid to half. Strain through a fine sieve. Add the cookies. Reduce some more and add the corn starch. Mix well with a hand mixer. Add the creme fraiche - without boiling the sauce now. Season with Salt and Pepper.