2) Heat the oil in a large pan and add the mustard seeds. When they have popped, add the cumin seeds, asafoetida, garlic, chillies and onions. Cook until the onions are lightly golden.
3) Add the tomatoes and turmeric. Cook for 4 to 5 minutes on a medium heat, stirring constantly.
3) Add the aubergine flesh, defrosted peas, salt, coriander seed powder and cumin seed powder. Mix thoroughly and cook for a further two minutes before removing from the heat and garnishing with chopped coriander.