For the mint butter, wash mint, shake dry and chop except for a little to garnish. Peel the garlic and press it through a garlic press to make butter. Mix butter with mint, season with salt.
Form into a roll using cling film and chill for about 1 hour.
Quarter the pomegranate and remove the seeds. Roast peppercorns and Szechuan pepper in a pan without fat. Take them out and crush them roughly in a mortar.
Dab the fillet dry. Heat the oil in a frying pan. Fry the fillet for 4-5 minutes. Season with salt. Remove and turn in crushed pepper. Wrap in aluminium foil and let it rest for about 5 minutes.
Meanwhile 1⁄4 l Boil up salt water. Sprinkle in couscous and allow to swell according to package instructions. Fold in pomegranate seeds and season with pepper.
Cut the mint butter into slices. Slice the Szechuan lamb fillet and serve with mint butter and couscous. Garnish with rest of mint.