Measure and pour the milk in a non-stick pot (preferably) and put on the flame to boil. Wash and soak the Cashew in warm water (at least soak for half an hour).

In the meantime, wash, peel and grate the watermelon rinds.In between add a pinch (4-5 saffron strands) of saffron to the milk. Boil and simmer the milk for about 20-25minutes, it will reduce a bit.

After 15 minutes or so of cooking the rind in milk,add the Cashew paste and cook for another 10 minutes (lower the flame). Keep stirring it so that it doesn't stick to the bottom of the pot.

Now you can add a pinch or two of the green edible food powder (or gel) and mix and stir.

(Powder the sugar if the granules are big, so that it melts quickly or leave as it is) Now add the sugar and cook for another 30 minutes till it thickens, dries and forms a doughy texture but don't overdry it because it will firm up once it cools.

In between prepare a plate (grease it with ghee) or tape a butter paper on a rectangular shape chopping board and apply little ghee on it too and put the doughy burfi mixture on it and spread it with the help of something flat like a steel spatula and your fingers to give it a rectangular or square shape (as shown in the picture). Let it cool and come to room temperature.(It took me nearly 1:45 hours.)

Once it comes to room temperature, chill it in the fridge for at least two hours so that it can firm up a bit more and you can easily cut it into burfi as per your desired shape-square, rectangle, rhombus. If you are using edible silver leaf, apply it before you cut and if you are garnishing it with more nuts like pista, almond slivers, you can do that even after you cut it.