Take the mawa / khoya and measure 1/2 cup from it. Keep it in a microwave safe bowl. Crumble slightly. Cover the bowl with a microwave safe plate.
Microwave on high power (800W) for one minute. Remove the bowl and stir the khoya with a spoon. Again cover it and microwave for one more minute on high power.
Remove the bowl and mix well. Khoya may be slightly golden brown in color. Make sure it is not burnt. Transfer the khoya to a plate immediately and let it cool down completely.
In the meantime, take the sugar and cardamom seeds in a mixie jar. Grind to smooth powder and set aside.
Take the cooled khoya and crumble it finely with your fingers. Add the powdered sugar to it and mix well. Check for taste and add more sugar if needed. If using roasted cashews, add at this stage.
Take a portion of the khoya, roll tightly and shape into a smooth round ladoo. Decorate the ladoo with a dot of color and melon seed on top. Store in an airtight container and enjoy for 2 days!