Mix in a bowl the yoghurt, oil, spearmint and garlic. Season with salt and pepper and after mixing well add the ostrich meat. Cover the bowl and place it in the fridge for an hour. After an hour remove the marinated meat from the fridge and thread it on skewers together with the bay leaves. Bake in preheated oven for 10 minutes in 180 C. Baste them regularly with the mix that you used for marinating the meat. Serve hot with rice. You can use the yoghurt mix as a sauce for the rice.