Season the roast turkey with salt and pepper. Squeeze the garlic and rub the roast with it. Briefly fry all around in a little oil in a pan.
Place the roast in an ovenproof dish. Remove the roasting set in the pan with water and add the broth. Thicken with sauce thickener if desired. Season to taste with salt and pepper. Brush the roast with 2-3 tablespoons of crème fraîche and stir the rest of the crème fraîche into the sauce. Put the sauce in the pan next to the roast. Bake at 150 ° for around 2.5 hours. If the cream on the roast becomes too dark, cover the roast with aluminum foil.