Mix together the khoya, semolina, sugar, ghee, baking powder and eggs and beat well till the mixture turns very smooth, like cake batter. Mix in the saffron and 3/4 of the nuts and divide between three greased, medium-sized thalls. Spread cardamom powder evenly on top and sprinkle with Ilse remaining nuts. Bake in a moderate oven till it turns a rich golden colour. (Also insert a toothpick at the centre and if it comes out clean, remove from fire.) Serve hot or cold.