How to cook
Wash and dry the leg. Make small slits with a knife and stuff pre-chopped green spices inside. Beat the mustard with a little oil and rub the meat thoroughly.
Allow to marinate in a cool place for 1-2 hours. Sprinkle the meat with the remaining herbs and move it to the appropriate greased tray. Heat the butter with a little oil and pour some on it spoon by spoon.
Peel and slice the potatoes, if necessary. Spread them around the leg. Sprinkle spices and add a glass of water, or white wine.
Cover the pan with foil and place the leg of lamb with potatoes in to bake at 356°F (180°C) - 392°F (200°C) for about 2 - 2.30 hours