Soak javarrisi in hot water (around 1 + 1/2 cup) for 1 - 2 hours. There will be a white layer in the water, strain the javarrisi in a strainer/ colander and wash it with fresh water thrice
Add ghee/ butter to the heavy-bottomed pan and once the pan gets hot add cashew; cook till the cashew turns golden brown
In the same pan add sago and sauté for 30 seconds. Add milk and sago, continue cooking till javvarisi is done; stirring occasionally to prevent sago from sticking to the pan
Add condensed milk and salt; continue cooking for 6-8 minutes. Add sugar and stir well; cook in low flame for a minute. Serve immediately or chill and serve