Tave Kosi (baked lamb and rice with yogurt)

Heat 20 g butter and oil in a large frying pan over medium heat. Season lamb, add to pan and cook, turning occasionally, for 5 minutes or until golden. Add garlic and cook, stirring, for 2 minutes or until golden, then add 200 ml water. Bring to a simmer and cook over low heat for 1 hour and 30 minutes or until lamb is just tender. Drain off liquid leaving 150 ml, stir through rice and oregano. Season and then transfer to a 3-litre capacity baking dish. Set aside.
Preheat oven to 180°C. Heat remaining 80 g butter in a small saucepan. Add flour and cook, stirring, for 2 minutes. Set aside.
Whisk together yoghurt and eggs. Season, then whisk in flour mixture until smooth. Pour over lamb, smooth surface and bake for 40 minutes or until golden and meat is tender. Serve hot with a green salad, if desired.