Step 1

Heat the oil in a large pan and fry the onion for a few mins until softened. Add the spices and cook for 1 min, then stir in the lentils, sweet potatoes, stock and the cherry tomatoes.

Step 2

Bring to the boil, then cover and simmer for 20 mins until the lentils and sweet potatoes are tender. Add the beans and cook for 2 mins then stir in the yogurt and some seasoning. Sprinkle over the coriander and chopped cucumber if using and serve with naan bread and rice.