As already said, nellikai pachadi or nellikai thogayal is done on Dwadashi days.
Big nellikai(Amla) - 2
Salt - as per taste
Green chillies - 2
Curd - 1 cup
Scraped coconut - 2 teaspoons
Mustard seeds - 1/4 tsp.
Urad dhal - 1/2 tsp.
Steam cook nellikai and discard the seeds. Mash the cooked nellikai using your hand. In a mixie, grind the green chillies, salt and scraped coconut, add mashed nellikai and give it a whip.
Transfer it to a bowl and add the curd . Mix well.
Season it with mustard seeds and urad dhal.