Sieve the besan and keep aside.
Heat a pan or wok and add ghee into it.
Once the ghee melts, add the besan into it and keep on stirring.
After 8 to 10 minutes you will start getting nice aroma. At this point switch off the flame and allow to cool.
Add cardamom powder into the mixture and mix well.
After few minutes of cooling down when the mixture is warm (so that you can handle it) , add sugar powder and mix well.
Now grease your palm and divide the mixture in 5 to 6 equal portions and give them a shape of ladoo.
Garnish them with chopped pistachios and serve them or store them in air tight container.