Boil the smoked pork with the bouquet garni in a large pot of water for 2 hours.
Julienne the radishes, peel and mince the shallot and snip the chives. Mix together the horseradish, crème fraîche, julienned radish and chives, and season.
Carve the slices of smoked pork (hot or cold) and dress with the horseradish sauce.