Wash the mangoes well in a colander for 3-4 times. Wipe the mangoes in clean towel
Spread the mangoes in towel in a place where you get some sunlight for an hour
In a wide bowl add mangoes, sesame oil and castor oil, with a dry hand mix well to coat the oil with Mangoes
Soak mustard in water for 10 minutes and drain the water
In a mixie jar add all the ingredients except mangoes, little water; grind them into a fine paste
Add the paste to the mangoes and mix with a ladle
Transfer the content into a jar and place in dry place for 8 - 10 days
Everyday shake the jar well, after a week mangoes will start shrinking and maavadu water will come. Maavadu is ready