Grind and dry roast oats and keep aside.In bowl, add dry roasted oats, besan, salt, haldi, mango puree, buttermilk and make a batter.
Make sure there are no lumps in it.In pan, pour this batter and keep on stiring it evenly to avoid lump formation.
Continuously stir it for about 8-10 minutes.Grease back side of a flat plate.Then pour a portion of this mixture on back side of plate.
Spread it evenly as thin as possible. Leave it for a while and cut into thin strips.
Roll strips and cut in into 1 inch piece and place it in a plate.
For tadka
In a pan, add oil. Add rai, leaves, hing, green chilies, curry leaves and turn off flame. Pour this tadka on Mango Oats khandvi and garnish with grated coconut and serve.