firstly, in a large bowl take 1 cup sugar and ½ cup custard powder.
add in 1 cup water and whisk well.
make sure there are no lumps and sugar dissolved completely. keep aside.
now heat 2 tbsp ghee in a large kadai and roast 5 chopped cashews.
now pour prepared sugar-custard mixture stirring continuously, keeping flame on low else lumps might form.
also pour 1 tbsp of kesar water / saffron water.
stir continuously till the mixture thickens and starts to separate from pan.
transfer the custard halwa into small bowl or into greased tray like prepared in corn flour halwa.
rest for 30 minutes or till it cools slightly.