Heat the oil in a large pan over a medium heat and fry the onions for 8 mins, stirring often until softened. Stir in the garlic, chillies, curry powder, cumin seeds, turmeric and lentils, and cook for a few minutes more, still stirring. Pour in the stock and sweetcorn. Bring to the boil, then cover, reduce the heat and simmer for 15-20 mins, or until the lentils are tender.

Remove from the heat and briefly blitz the soup using a hand blender – you don’t want it to be completely smooth. Add the potatoes, then cover and return to a medium heat for 10-15 mins more, or until the potatoes are tender. Remove from the heat and stir in the yogurt and coriander.

Serve two bowlfuls straightaway. Leave the rest of the soup to cool completely, then keep chilled for up to four days. Reheat in a pan over a low heat until piping hot. Try our Healthy Diet Plan, packed with 7 days of nourishing breakfasts, lunches and dinners – available exclusively within the Good Food app.