Rasam is a traditional Southern Indian recipe for a spicy vegetarian soup. The full recipe is presented here and I hope you enjoy this classic Southern Indian version of Rasam.
Dry-roast the cumin seeds, mustard seeds and black peppercorns in a frying pan until aromatic and beginning to crack.
Mix the roast spices with all the other ingredients and bring to the boil. Lower the heat and simmer for about 30 minutes. Garnish with the freshly-chopped coriander and serve immediately.