Thukpa is a soup shared by both the Nepali and Tibetan Sherpa communities. “To handle the freezing winters in high altitude, their diet is heavily based on carbohydrates,” explains Santosh Shah in his cookbook, Ayla.

“The soup is laced with the uplifting warmth of cumin, turmeric and timmur peppercorns. Some cooks add cornflour to thicken the soup, but I prefer a thinner broth with my noodles.”

Thukpa – Sherpa noodle soup recipe

Ingredients:(Serves 4)

100g soba noodles, or egg noodles3tbsp vegetable oil½tsp hing (asafoetida)300g free-range chicken breast, finely chopped½tsp ground turmeric50g finely chopped carrots180g finely chopped mixed peppers50g thinly sliced green French beans80g finely shredded white cabbage1tsp salt800ml chicken stock2tbsp fresh coriander, chopped1 lemon, quartered, to serve (optional)

For the spice paste:1 large garlic clove4tsps finely chopped fresh ginger4 fresh green chillies, roughly chopped½tbsp cumin seeds, dry roasted5 Sichuan peppercorns or timmur peppercorns (timmur is native to Nepal and is a cousin of the Sichuan peppercorn)¼tsp black peppercorns1tbsp fresh coriander, chopped1 small tomato, deseeded and chopped

Method:

1. Start by making the spice paste. Place all the ingredients for the spice paste except the tomato in a small food processor or electric spice grinder. Blend until you get a paste. Add the chopped tomato and blend again. You should get a smooth, spoonable paste. You can make this paste in advance and keep it in the refrigerator for two to three days, or in the freezer for one month.

2. Cook the noodles according to the packet instructions and set aside.

3. Heat the oil in a large saucepan over medium heat. Stir in the hing and cook for a few seconds. Add the chicken and cook for five minutes, until slightly golden. Add the turmeric and cook for one minute.

4. Add all the vegetables and stir-fry for a couple of minutes. Stir in the salt and spice paste until all the ingredients are well coated. Cook for a couple of minutes.

5. Pour in the chicken stock, bring to the boil, reduce the heat and simmer for five minutes. Add the noodles and cook for a couple of minutes, just enough to reheat them.

6. Adjust the seasoning to taste, add the chopped coriander and serve with lemon quarters for squeezing over.

Ayla: A Feast Of Nepali Dishes From Terai, Hills And The Himalayas by Santosh Shah is published by DK, priced £20. Available now.