Preheat oven to 160°C (140°C fan forced). Carefully place half the lamb … Add meat and brown … 2 pounds lamb stew meat (or stew beef) 1/2 cup flour 1 1/2 cups onion (chopped) 2 carrots (chopped into large pieces) 4 potatoes (diced) 2 tomatoes (peeled and chopped, or 1 (14.5-ounce) can diced … To make the dumplings: Sift the flour and baking powder together. Heat the oil on the stove over medium- high heat for 1 minute. 2. Combine the mustard, egg, oil and milk. Heat a heavy casserole pan (one with a lid) and add the oil. 1. Cut excess fat from the lamb and discard it. How To Make Lamb Casserole with Dumplings: Preheat oven to 140C. 3. Cut the lamb into 4cm (1½-inch) pieces. Add the diced veggies and garlic. Turn the dumplings… Put 2 teaspoons of the oil in a small flameproof baking dish. Soften for 5 minutes. Lamb casserole with herb dumplings. Pour the egg mixture into the sifted flour and stir to form a soft dough. Place heaped teaspoons full of the mixture onto the lamb stew in the pot, cover and leave for about 5-6 min.