Mix the potatoes, celery and cherries with the oil and sage, season. Spread onto a baking tray lined with baking paper.
Approx. 35 mins. in the centre of an oven preheated to 200°C. Turn the oven down to 80°C.
Place the sage on top of the meat, tie with kitchen twine. Heat the clarified butter in a frying pan. Season the meat, brown on all sides for approx. 4 mins., place the meat on top of the vegetables.
To finish cooking
Approx. 1½ hrs. in the centre of the oven. The core temperature should be approx. 58°C. Carve the meat, serve with the cherries and vegetables.