Drain the poppy seeds and grind with very little water to a thick paste. Heat ghee in a non stick pan, add poppy seed paste and saute for about 12-15 minutes or till it turns a light brown.
Reduce heat and add milk and cook, stirring continuously, till it begins to thicken. Add chopped nuts and mix well. Add diet sugar and mix well.
Transfer into a serving bowl, garnish with fried almonds and cashewnuts and serve hot.