Clean the spinach leaves, discard the stalk. Cut the leaves. Wash them and put in a colander for sometime.
Take a little oil, saute the green chilli, put them aside in a plate, roast cumin for few seconds. Put it aside along with green chilli. Now,saute the spinach leaves for two minutes.
Once it cools, grind them along with coconut.
Remove in a bowl. Add salt to it. Whisk the curd and put it.
Make seasoning. Take oil in a pan, add mustard seeeds, as it splutters, add turmeric powder and asafoetida and pour it over the tambli.
Spinach tambli is ready to serve.