Rinse again, and pick out as many empty seeds as possible. Bugs tend to get to these, and you’ll find more than a few empty husks.
Transfer to a blender, add fresh clean water to cover and blend. Add more water if needed.
Extract the milk by straining over a cheesecloth. Use a spoon, and squeeze the cheesecloth with your hands.
Add more water and blend again to extract the “second milk.”
Now strain all the milk once more—trust me, it’s needed to get out all the husk bits remaining.
Transfer the milk to a heavy-bottomed pan, and bring to a simmer.
Once bubbles form, add the jaggery syrup. Mix well.
Follow with the ½ cup rice paste and stir constantly as this thickens the paruthi paal. Bring to a rolling boil, but keep stirring.
Add the spice mixture (saving a pinch or two to garnish), give it all a good stir, and switch off the flame. Transfer to a copper vessel, if you can, to store.