Heat oil in saucepan. Add onions, and fry till
soft, add meat and spices, fry for a few minutes, then
add the water. Bring to the boil, lower the heat, cover
and simmer for 1 hour or till the meat is tender.
Put yoghurt in a big saucepan mix with, egg,
cornflower and salt. Bring to the boil, (stirring all
the time) lower the heat.
Add the cooked meat with its sauce, to the yoghurt,
then simmer for 10 minutes.
Meanwhile, heat the butter in a pan, add garlic and
mint, fry for 1 minute, then pour over the yoghurt.