In a food processor blitz the leftover rotli to fine crumbs.
In a pan add ghee and jaggery and let it cook on low flame until jaggery has melted. Turn off gas. Add cardamom powder, almond powder, milk powder and rotli crumbs to the melted jaggery and mix well.
Make ladoos to your desired shapes. Sprinkle khuskhus on top of ladoo and let it set for couple of hours. You can eat straight away as well.