Lamb
Combine all of the basting mix ingredients and stir well. Place lamb in a roasting dish and pour over the basting mix. Roast lamb in a 180 degrees celsius oven for 1.1/2 hours, basting every 20 minutes.
Blueberry Sauce
Combine ¾ of fresh blueberries with other ingredients and simmer for 5 minutes. Thicken with 2 tbsp of cornflour and 1/4 cup water. Slice lamb onto a serving plate, arrange the final quarter of fresh blueberries on top and spoon over some of the sauce. Serve the remainder of the sauce separately.