Wash meat the day before, dab dry. Mix soup powder and spices. Rub the meat with it and put it in a roaster. Cover and leave to cool overnight.
The next day, roast the meat in a mould or roaster in a hot oven (electric cooker: 150 °C/circulating air: 125 °C/gas: see manufacturer) for approx. 5 hours. From time to time, top with roast stock. Cover the roast and let it rest for approx. 10 minutes, cut it open and arrange it.
Served with: tomato-mango salsa, peanut-curry dip and toasted bread-avocado salad