Adapted from a BBC Good Food recipe. 


2 tbsp vegetable or olive oil
1 red onion, chopped

1 tsp cumin seed

1 tsp mustard

1 tsp garam masala

1/2 tsp ground coriander 

1 tbsp medium curry powder

100g green lentils

2 medium sweet potatoes, peeled and cut into chunks

500ml vegetable stock

400g can chopped tomato

¼ small pack coriander (optional)

natural yogurt, mango chutney and naan bread, to serve