Melt the jaggery with a little water and strain it to remove impurities.
Whisk the eggs gently in a bowl without creating too much foam.
Add coconut milk, jaggery syrup, cardamom, and nutmeg, then mix well.
Strain the mixture for a smooth custard texture.
Pour into a greased heatproof dish.
Steam on low to medium heat for about 25–35 minutes, until the custard is set.
Cool, garnish with cashews, and serve chilled.