Place 500 g lamb in a pressure cooker with salt to taste and 2 litres of water. Cook under pressure for 40 minutes until the meat is tender (or simmer in a large, heavy pot with 4 litres of water for 1 to 1½ hours).
Open the cooker and stir in the soup seasoning, 12 g green chilli, 50 g coriander leaf, and 50 g mint into the broth, which should measure around 1.5 litres.
Warm 4.4 g ghee in a frying pan over medium heat. Add 150 g onion and fry for roughly 4 minutes until lightly browned.
Transfer the fried onions and ghee into the soup and simmer gently over low heat for 5 minutes. Ladle into bowls and serve hot with lime juice to taste.
Use about 30% of the weight of fresh mint. Rub between your palms to crush before stirring in; the flavour will be more intensely herbal and less bright.
Use 120% of the weight; melt gently over low heat to avoid burning the milk solids, which will yield a softer, creamier richness rather than a nutty aroma.
Use 80% of the weight, finely shredded and browned slowly with a pinch of asafoetida. Replicates the bulk and natural sweetness in gravies without allium.