clean the spring onions and chop them finely.
take a tsp of ghee in a frying pan. to that add cumin seeds, green chilli and spring onion.
fry on a medium flame till spring onions shrink in size.
allow spring onions to cool completely.
in a blender, take the fried spring onion mixture with coconut.
add warm water and grind them to a fine paste.
now transfer this to a bowl. add curd or buttermilk and mix it well. add water to adjust the tambli consistency.
add salt to taste and mix well.
now in a seasoning pan heat ghee, add mustard, jeera, red chilli, curry leaves and hing.tadka
when the mustard seeds splutter add it to tambuli.
serve it along with hot steamed rice.