1 leg of lamb (approximately 2 kg)
1 tablespoon flour
4 cloves garlic, finely chopped
2 tablespoons mustard
1 medium onion, chopped
1 cup dry white wine
Pepper and salt to taste
1/2 cup chopped fresh peppermint
Make a few holes in the leg of lamb with a knife. Mix the spices and make a marinade, pour over the meat and leave overnight. Drain the leg of lamb well and set the marinade to one side. Place the meat on a baking tray. Cover with aluminium foil and bake in a medium oven (180ºC) for about 1 hour. Remove the aluminium foil, drizzle with a little of the marinade and bake again.
When the meat is browned, remove it from the tray. Place the remaining marinade in the same tray, add the flour, let it boil and continue stirring until thickened slightly.
Sieve the sauce, add some chopped mint leaves and serve in a gravy boat.