Chop the onion, garlic, ginger and chillies together in a food processor.
Heat the oil in a large frying pan and fry the mixture until it becomes fragrant.
Add the mince and fry until it begins to brown, stirring to break up any lumps.
Add the curry paste, tomato purée, cumin seeds and some salt and pepper and fry for 1 minute.
Add the tinned tomatoes and mango chutney and bring to a simmer.
Cook for 1 minute then add the yoghurt and a good splash of water and cook the mixture for 30 minutes.
Add the frozen peas and cook for 5 minutes, then stir in the coriander and cook for a further minute
Add a good squeeze of lemon juice and adjust the seasoning if necessary.