Take a flat microwave safe bowl, put the cashew nuts in it. Spread them evenly and microwave on medium power for five minutes. Check, toss, reduce the temperature and microwave for three more minutes. I put them at 600 power for five minutes, checking every minute and again put at 300 power for 3 minutes.
Once they are golden in colour, remove in a plate, add ghee, put the cashew nuts and switch on the power for 30 seconds. Sprinkle salt, chilly powder and chaat masala, mix and heat it for 30 seconds again.
Notes
Use microwave safe glass bowls for cooking.
Time may vary for each model, check when they are done, you get a good aroma and they are golden in colour.