Wash the meat, dab dry and season with salt on both sides. Drain the peppercorns. Mix 3 tablespoons of pepper, cream cheese, mustard and cayenne pepper, season with salt if necessary. Brush the meat with it, roll it up and pin it with a toothpick at the seams. Tie together with kitchen string.
Place roast on the fat pan of the oven, brush with 1 tablespoon of oil. Wash the rosemary, dab dry, put something aside for garnishing. Spread 2 tablespoons of pepper and rosemary on the roast. Roast in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 1 hour. Peel, wash and slice the potatoes. After 1 hour spread them on the baking tray, sprinkle with 2 tablespoons of oil and season with salt. Increase oven temperature (electric oven: 200 °C/ convection oven: 175 °C/ gas: level 3) and roast for 30 minutes. Wash the mint, dab dry, put something aside for garnishing. Cut the rest into fine strips. Stir into the yoghurt, season to taste with salt and pepper.
After 1 hour spread them on the baking tray, sprinkle with 2 tablespoons of oil and season with salt. Increase oven temperature (electric oven: 200 °C/ convection oven: 175 °C/ gas: level 3) and roast for 30 minutes. Wash the mint, dab dry, put something aside for garnishing. Cut the rest into fine strips. Stir into the yoghurt, season to taste with salt and pepper. Cut the roast open and serve with potatoes, olives and mint yoghurt. Garnish with herbs set aside