Heat oil in a pan,add mustard seeds and all the other ingredients listed under to temper let it splutter
Peel off the skin of mangos and grate it using a grater and set aside
When the dals get slightly browned, and peanuts are roasted well, add grated raw mango
Add turmeric powder and saute for few mins till it is dry
Add salt and keep sauteing until it collects to thick pulp and it may take 10 mins
Switch off
Add it to cooked rice and mix well
serve hot