Season the roast turkey with salt and pepper, place in a roasting pan, add onions and carrots. Cover with a few flakes of butter and fry in a preheated oven at 220 degrees for about 1 hour. Water and turn from time to time. The vegetables should also turn a nice brown.
Take out the roast and keep warm, remove the vegetables. Deglaze the meat stock with the stock, add a little peach juice. Put everything in a small saucepan, thicken with crème fraîche and season to taste. Heat 5 - 6 peach halves in the remaining peach juice. Place the roast on a preheated platter and cover with the drained peaches. Serve the sauce separately.