Erisseri is a mildly spiced South Indian curry of tender yam and plantain simmered in a fragrant coconut gravy. Finished with coconut toasted golden in oil with mustard seeds and curry leaves, it is rich, nutty, and subtly earthy.
Place 400 g coconut and the cumin for the paste into a food processor with a splash of water, then grind to a smooth paste.
Bring 500 ml of water to the boil in a large saucepan. Tip in 500 g elephant's foot yam, the plantain, the ground spices for the curry, and salt to taste, then cook for around 20 minutes until the vegetables are tender.
Stir the blended coconut paste into the pan and bring to a boil for 2 minutes. Turn the heat down low and simmer for roughly 10 minutes until the sauce has thickened, then take the pan off the heat.
Heat 2 tablespoons oil in a frying pan over medium heat. Add the mustard seeds from the tempering spices and cook for about 1 minute until they begin popping, then toss in the dried red chillies from the tempering spices and swirl for 10 seconds.
Add the remaining 400 g coconut and 5 g curry leaf to the frying pan, stirring constantly until the coconut turns evenly golden-brown. Pour the hot tempering directly into the curry, stir thoroughly, and serve.
Steep a tiny pinch (0.1 g per 2 g turmeric) in 2 tbsp warm water; use to match the rich golden hue. Contributes an aristocratic, honeyed floral flavour rather than earthy bitterness.
Use the same weight. The seeds are smaller and hotter; fry in hot oil until they pop, about 20–30 seconds, and reduce the heat if they darken too fast. The dish will be a little sharper.
Use 70% of the weight of whole seed, added with the other ground spices rather than fried whole. You lose the popping texture and the heat comes through more evenly.