PREHEAT OVEN TO 160ºC . Heat the olive oil over medium heat in a heavy roasting pan or Dutch oven and brown the meat well. Remove from the pan and set aside. Pour off all but 2 tablespoons fat, add the onions, carrots and celery and cook 5 minutes. Add the garlic, wine, water, lemon, salt and preserves. Replace the venison. Cover and place in the oven for 1.5 hours or until tender. When venison is tender, remove from the sauce, strain the sauce through a fine sieve and discard the vegetables. Skim and discard fat from the surface of the braising liquid. Add the peppercorns, cream and butter and place the sauce in a pot and simmer for 5 minutes. To serve, arrange the meat on a platter and pour over the sauce.