Grind mustard seeds, grated coconut and chillies to a fine paste and add it to the mango pulp.
Bring the mixture to a boil and add jaggery and salt as per the sourness of the mangoes for a sweet, sour and hot flavour.
Heat oil. Put in a pinch of asafoetida and mustard seeds.
When the mustard seeds sputter, pour in the mango mixture.
Simmer for a couple of minutes.
Serve with rotis or parathas.
This preparation can be kept in the refrigerator for a week.
Ingredients: 10 - ripe small sized raival mangoes
1 bowl - grated fresh coconut
1 teaspoon - mustard seed
4 to 5 - dried red chillies
a pinch of asafoetida
oil as required
salt and jaggery as per taste